Let’s discuss the similarity and difference between the Hoover SteamVac carpet cleaners, including Hoover SteamVac with Clean Surge(F5914900, F5914900PC, F5915905, F5915905NC), SteamVac Plus with Clean Surge (F5914901NC).
The machine body seems to be the same, the only difference might be the color and the tools they come with. Some models come with the SpinScrub Powered Hand Tool and Upholstery Tool, such as the F5914900, while some come with only the Upholstery Tool, such as the F5915905

Here is reply from Hoover customer care

The units are the same. The model numbers are different because of where the units are sold retail wise as well the color. The tools vary per model as well.

If you know more difference between them, please share below to help people choose the right Steamvac carpet washers.

Here we’ll compare the similarity and difference between the Hoover Power Scrub carpet cleaning machine models, including:

• Power Scrub FH50135,
• Power Scrub Deluxe FH50141,FH50150,FH50150NC,
• Power Scrub Deluxe MultiFloor FH50170,FH50170PC,
• Power Scrub Elite FH50250,
• Power Scrub Elite Pet FH50251, FH50251PC
• Power Scrub Elite Pet Plus FH50252,FH50258
• Power Scrub Elite MultiFloor FH50253PC,FH50254PC,FH50255PC,FH50256PC.

If you are deciding between these Hoover carpet/rug extractors, then the following info may be helpful for making an informed decision.

All of these Hoover Power Scrub carpet shampooers feature:

• SpinScrub counter brushes, Hoover claimed that the counter rotating brushes spin for constant carpet contact, cleaning surrounding carpet fibers, tackles the toughest dirt, without damaging your carpet.
• The brushes can be removed for cleanup.
• Separate clean water tank and dirty water recovery tank to separate clean and dirty water, making filling and emptying conveniently.
• 8-foot hose to use with attachments for spots and above floor cleaning.
• HeatForce technology to apply hot air directly to the cleaning spots for faster drying.
• 10 amps motor.
• 20-foot power cord.
• Weighs less than 19 pounds.
• Carry 2 year limited warranty.

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However, there are differences between these machines.

• Power Scrub
  This is the basic version.
  Has one gallon tank capacity and 11.25-inch cleaning path.
  FH50135 comes with an 8-foot Hose, Upholstery Tool, Sample Bottle of Cleaning Solution, Mesh Tool Storage Bag.
• Power Scrub Deluxe
  The Deluxe version adds a Wash/Rinse selector. If you want to remove solution residue from carpet, select the Rinse mode to rinse the carpet with water only.
  
  

  image from Hoover infomercial

  
  And the Clean Water / Solution Tank now is divided into two sections, the Clean Water Tank is for water only and the Solution Tank is for cleaning solution only. Hoover claim that the Automatic Detergent Mixing System mix the optimal amount of detergent with water for optimal cleaning results.
  Inclueded tools may vary, always ask the seller before buying.
  FH50141, Blue, comes with an 8-Foot Hose, SpinScrub Powered Hand Tool, Stair Tool, Upholstery Tool, Crevice Tool, Sample Bottle of Cleaning Solution, Mesh Tool Storage Bag.
  FH50150, Red, comes with an 8-Foot Hose, Stair Tool, Upholstery Tool, Crevice Tool, Sample Bottle of Solution,Mesh Tool Storage Bag, SpinScrub Powered Hand Tool (may not include)
  FH50150V, Red, comes with an 8-Foot Hose, SpinScrub Powered Hand Tool, Stair Tool, Upholstery Tool, Crevice Tool, Sample Bottle of Cleaning Solution, Mesh Tool Storage Bag
  FH50150NC, Red, comes with an 8-Foot Hose, Stair Tool, Upholstery Tool, Crevice Tool,Sample Bottle of Cleaning Solution, Mesh Tool Storage Bag
• Power Scrub Deluxe MultiFloor
  All the Power Scrub Deluxe MultiFloor models come with a Squeegee Tool for hard floor cleaning.
  
  

  image from Hoover infomercial

  
  FH50170 and FH50170PC are the same, both are Red, come with an 8-Foot Hose, SpinScrub Powered Hand Tool, Stair Tool, Upholstery Tool, Crevice Tool, Sample Bottle of Solution,Mesh Tool Storage Bag, Hard Floor Squeegee Attachment.
• Power Scrub Elite
  This version has wider nozzle – 12-inch cleaning path, and larger tanks that holds up to 1.25 gallons.
  It also adds edge cleaning brushes, and a mode selector that allows you to choose between Deep Clean mode and Quick Clean mode, the Deep Clean mode is for removing embedded dirt and stains, while the Quick Clean mode is for rapid carpet/rug cleaning. Hoover claims that carpets/rugs would dry in less than 45 minutes in Quick Clean Mode.
  
  

  image from Hoover infomercial

  
  FH50250 comes with an 8-foot Hose, Stair Tool, Upholstery Tool, Crevice Tool, Sample Bottle of Cleaning Solution, Accessory Bag.
• Power Scrub Elite Pet
  This one is similar to the Elite, but comes with a tool, 2-in-1 Antimicrobial Pet Tool, which is good for removing pet mess and stains. It has two sets of brushes, the rubber nub insert is for unpleasant stain removal and hygienic clean-ups, the bristle insert is for tough scrubbing power.
  
  

  image from Hoover infomercial

  
  FH50251 and FH50251PC are the same, both are red, comes with an 8-Foot Hose, 2-in-1 Antimicrobial Pet Tool, Sample Bottle of Cleaning Solution, Accessory Bag.

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• Power Scrub Elite Pet Plus
  The difference between Power Scrub Elite Pet Plus and Power Scrub Elite Pet is the Plus comes with more tools.
  FH50252 and FH50258 come with an 8-foot Hose, 2-in-1 Antimicrobial Pet Tool, Stair Tool, Crevice Tool, Sample Bottle of Cleaning Solution, Accessory Bag
• Power Scrub Elite Multi-Floor
  This one comes with a Hard Floor Squeegee Tool like the Power Scrub Deluxe MultiFloor, that enables it to clean on hard floors.
  The FH50253PC, FH50254PC, FH50255PC, FH50256PC are the same except for the color.
  FH50253PC, Red; FH50254PC, Green; FH50255PC, Blue; FH50256PC, Puple;
  all come with an 8-foot Hose, Hard Floor Squeegee Tool, 2-in-1 Antimicrobial Pet Tool, Crevice Tool, 32 oz. Multifloor Plus Cleaning Solution, 12 oz. Expert Clean Solution, Accessory Bag.

Power Scrub Comparison table to show some key differences between them:
(FH50135 vs FH50141 vs FH50150 vs FH50170 vs FH50250 vs FH50251 vs FH50252/FH50258 vs FH50253PC vs FH50254PC vs FH50255PC vs FH50256PC)

Series	Model	Tank Capacity	Cleaning Path	Wash/Rinse Selector	Deep/Quick Clean Mode Selector	Edge Brush	2-in-1 Pet Tool	Hard Floor Squeegee
Power Scrub	FH50135	1 gallon	11.25-inch	No	No	No	No	No
Power Scrub Deluxe	FH50141,FH50150,FH50150NC	1 gallon	11.25-inch	Yes	No	No	No	No
Power Scrub Deluxe MultiFloor	FH50170,FH50170PC	1 gallon	11.25-inch	Yes	No	No	No	Yes
Power Scrub Elite	FH50250	1. 25 gallons	12-inch	Yes	Yes	Yes	No	No
Power Scrub Elite Pet	FH50251, FH50251PC	1. 25 gallons	12-inch	Yes	Yes	Yes	Yes	No
Power Scrub Elite Pet Plus	FH50252,FH50258	1. 25 gallons	12-inch	Yes	Yes	Yes	Yes	No
Power Scrub Elite MultiFloor	FH50253PC,FH50254PC,FH50255PC,FH50256PC	1. 25 gallons	12-inch	Yes	Yes	Yes	Yes	Yes

If you own these carpet cleaning machines, please share your experience; if you find anything incorrect in the above information, please point it out. Thanks.

Some questions and answers:

• Can you use these Hoover carpet extraction machines on hard floors such as tile floors?
  Yes, but you will need the hard floor Squeegee tool to clean non carpet floors. This tool is only included in the MultiFloor models. However, it can also be purchased separately. For cleaning hard floors, you should follow the flooring manufacturer’s cleaning recommendations. And do NOT use the machines on unsealed hardwood floors.
• Do they have a vacuum only mode?
  No, they do not function like a vacuum. Before using these machines, you should use a traditional vacuum cleaner to vacuum thoroughly.
• Do they have steam mode?
  No.
• Do they heat the water or need hot water?
  They do not have a heater. You can use hot water, but do NOT fill with water above 140°F (60°C). Using hot water has better cleaning performance compared to cold water.
• Can you use other brand’s solution for use with these machines?
  The manual says that Non-Hoover cleaning solutions void the warranty.
• Can you turn off the Power Scrub brushes?
  No, the brushes keep spinning when power is on, unless the handle is in upright position.

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Download manuals to learn more before buying:

• Hoover Power Scrub Manual
  http://tti.a.bigcontent.io/v1/static/FH50135_Hoover_User_Manual
• Hoover Power Scrub Deluxe User Guide
  http://tti.a.bigcontent.io/v1/static/FH50150NC_Hoover_User_Manual
• Hoover Power Scrub Elite Manual PDF
  https://tti.a.bigcontent.io/v1/static/FH50251_Hoover_User_Manual

Let’s discuss the difference between the Hoover Power Path carpet washer models, including Power Path FH50950, Power Path Deluxe FH50951/FH50951PC, Power Path Pro, Power Path Pro Advanced FH51102PC, Power Path Pro XL FH51101.

These models can be divided into 2 types based on the brush system.

The Power Path and Power Path Deluxe use dual rotating brushes.
While the Power Path Pro, Pro Advanced, and Pro XL use one rotating brush and a counter rotating spin scrub brushes block.

Other difference between them is as follows.

Wash/Rinse Selector
The Power Path Pro versions have a Wash/Rinse selector that allows you to choose to Wash or Rinse the surfaces while the Power Path and Deluxe do not feature this option.

Cleaning Surfaces
It seems that the Power Path and Deluxe can be used to clean carpeted surfaces.
While the Pro versions can clean both carpet and hard floors with the help of a Hard Floor Squeegee.

Motor
The Pro versions equipped with a 10 amp motor while the Power Path and Deluxe use a 6 amp motor.

Water Tank Capacity
The Pro versions have larger tanks, the Pro and Pro Advanced have 1 gallon clean water tank capacity, Pro XL has the largest size tank which holds up to 1.25 gallons.
While the Power Path and Deluxe have a 0.75 gallon clean water tank.

Cord Length
The Pro versions have a 22 ft. cord versus 20 ft. on the Power Path and Deluxe models.

Detergent Mixing
The Power Path and Deluxe have no detergent tanks, you have to use the measure cup to mix the detergen with the clean water tank before cleaning.
While the Pro versions have a detergent tank, and they mix the detergent with water automatically during cleaning.

Weight and Dimensions
The 3 Pro versions are larger, heavier, and have wider cleaning path.
The Power Path and Deluxe weighs about 13.5 lbs versus 19 lbs on the Pro versions.
The Power Path and Deluxe have a 11.75 inch cleaning path while the Pro versions have 13 inch cleaning path.

Handle Material
According to Hoover product pages, the Power Path and Deluxe feature plastic handle versus metal handle on the Pro versions.

Edge Cleaning Brush
The Power Path and Deluxe has no edge cleaning brushes while the Pro versions have.

Warranty
The Power Path and Deluxe carry one year limited warranty while the Pro versions carry a 2 year limited warranty.

Small difference between the similar models.
The Power Path Deluxe comes with a stair tool – a 6 inch wide, 2 built-in rows of brushes, for cleaning carpeted stairs while the Power Path does not include.
The Power Path Pro Advanced comes with the Hard Floor Squeegee while the other 2 Pro versions not include, the Pro XL has larger clean water tank (1.25 gallons) than the other 2 Pro versions (1 gallon).

Please share your opinions by commenting below if you know other difference between them, or find anything wrong in the info above, or have any experience with these Hoover Power Path carpet cleaners, thank you.