You will find some similarities and difference between Dyson DC41 and Hoover UH72400 within this post.
Dyson DC41 or Hoover UH72400
images from manufacturer

Cost: Hoover UH72400 is much cheaper.
When comparing Hoover UH72400 and Dyson DC41, cost is one of the most important factors that many people take into consideration. Not only the DC41, but also other Dyson units. You can find that there are lots of people complain that the Dyson is overpriced. So, if you like the Dyson DC41 features, but do not want to spend that much money for a vacuum, then the Hoover UH72400 is an alternative, it operates similarly to the Dyson. You get all similar features close to the Dyson technology with a better price tag, about 1/3 of the Dyson cost.

Steerable Feature:
DC41 features the Ball technology that many users like while the Hoover UH72400 has a similar steerable ability, but it still use fixed wheels, some reviews point out that the steerable functionality of the UH72400 might not be as great as a Dyson.

Weight:The UH72400 is lighter.
The Hoover UH72400 weighs less than 14 pounds while the Dyson DC41 weighs over 17 pounds.

Amps:
The DC41 operates at 10 amps while it’s 11 amps on Hoover UH72400. However, Dyson use air watts that is the rate of air flow through the machine to measure suction power. The DC41 provides 235 a suction power of air watts. The Hoover does not use air watts to measure the suction power.

Tools User Friendly:
Some users said that it is not as easy as a Dyson when switching to the hose/tools on the UH72400.

Nozzle Width: DC41 has wider nozzle width.
Nozzle Width on the UH72400 is 12.5 inches while it is 13.3 inches on the DC41.

Cord Length: DC41 has a longer cord.
The UH72400 has a 30 feet cord while the DC41 has a 35 feet cord.

Dirt Cup Capacity:
The DC41 has a large dust cup, it holds up to 0.55 gallon while the UH72400 has a dirt cup capacity of 1.2 liters.
p.S.
1 gallon [US, dry] = 4.404 883 8 liter
1 gallon [US, liquid] = 3.785 411 8 liter

Hose Length: The DC41 has a longer hose.
The UH72400 has a 12 feet hose while the DC41 has a 15.4 feet hose.

Some similarities: both are bagless, carry a 5 year limited warranty, features automatic height adjustment, HEPA filtration; no headlight, no retractable cord, no manual height adjustment.

You can download the manuals of DC41 and UH72400 to learn more about them, here is the official links:
http://www.dyson.com/medialibrary/Files/Dyson/Support/downloads/US/Floorcare/manuals/DC41_OPMAN_US_181011%20pdf.pdf
http://hoover.com/file/1269/

Leave a review below to help others make a choice between Hoover UH72400 and Dyson DC41 if you own these 2 vacuum cleaners.

Hoover UH30300 vs UH30600 vs UH30301

Some difference between Hoover UH30300,UH30300 and UH30600 is the amounts of height settings, nozzle width, hose length, weight, color, price.

• The Hoover UH30300 and UH30301 are the same, they have 5 height adjustments while the UH30600 has 7 settings.
• The nozzle width on UH30600 is wider, it is 15-inch while the nozzle width on UH30300 and UH30301 is 13.5 inches.
• The Hoover UH30600 has a longer hose, it is 15-foot while the UH30300 and UH30301 have a 8 feet hose. Longer hose can help extend the cleaning reach, this could be helpful when cleaning areas like stairs.
• The UH30600 has a telescopic wand whereas the UH30300 and UH30301 have a straight wand.

Hoover UH30600 features WindTunnel MAX Technology that creates 3 channels of suction to remove dirt.

Read the table below to get details:

Compare Hoover UH30300,UH30301 and UH30600

	Hoover UH30300 T-Series™ WindTunnel® Bagged Upright	Hoover UH30301 T-Series™ WindTunnel® Bagged Upright	Hoover UH30600 WindTunnel® MAX™ Bagged Upright
vacuum images from Hoover.com
Design	Upright	Upright	Upright
ad		Check Price at Amazon	Check Price at Amazon
Bagged or Bagless	Bagged	Bagged	Bagged
Cord Length	30-foot	30-foot	30-foot
Auto Cord Rewind	No	No	No
Amps	12 Amps	12 Amps	12 Amps
Motorized Brushroll	Yes	Yes	Yes
Suction Only Mode	Yes	Yes	Yes Brushroll can be turned off when vacuum hard floors.
Height Adjustment	5 Manual Settings	5 Manual Settings	7 Manual Height Settings
HEPA Filtration	Yes	Yes	Yes
Nozzle Width	13.5"	13.5"	15"
Headlight	Yes	Yes	Yes
Weight	15.9 lbs	15.9 lbs	18.4 lbs
Grip Type	D-Shaped Handle	D-Shaped Handle	D-Shaped Handle
WindTunnel Technology	WindTunnel Technology	WindTunnel Technology	Yes WindTunnel® MAX™ Technology offers 3 channels of suction
Full Bag Indicator	Yes	Yes	Yes
Suction Control	No	No	No
Edge Cleaning Brush	No does not equip with edge brush for edge cleaning	No	No
Self-propelled	No	No	No
Folding Down Handle	No	No	No
Hose Type	Stretch Hose	Stretch Hose	Stretch Hose
Hose Length	8-foot	8-foot	15-foot
Included Tools	Air Powered Hand Tool, Crevice Tool, Dusting Brush	Air-Powered Hand Tool, Crevice Tool, Upholstery Tool/Dusting Brush	Air Powered Hand Tool, Crevice Tool, Dusting Brush
Cleaning Wand	Yes	Yes	Yes Telescopic
Color	Blue	Blue	Red
Warranty	2 year limited warranty	2 year limited warranty	2 year limited warranty
Manual	http://tti.a.bigcontent.io/v1/static/UH30300_Hoover_User_Manual		http://tti.a.bigcontent.io/v1/static/UH30600_Hoover_User_Manual

Similarities:

• They are corded, have a 30-foot power cord which allows you to vacuum your home with no need to keep switching outlets.
• Fingertip power control for turning on/off the machine without bending over.
• Bagged, so you no need to touch any messes while empty. Just dump the bag.
• Check bag indicator to tell you when to check if there is any blockage in the nozzle, hose, tools or at the bag opening or the bag is full.
• HEPA media filtration captures 99.7 percent of dirt, dust, pollen, and allergens down to 0.3 microns, and then emit clean air, so you can breathe fresh air.
• Powered by 12 amp motor.
• Brushroll can be turned off when cleaning bare floors.
• Have multiple height settings for cleaning different surface types.
• Transparent brushroll window allows you to easily check if anything wrapping around the roller.
• Headlight to help reveal hidden dust.
• Come with tools for above floor cleaning.
  Dusting Brush/Upholstery Tool for cleaning upholstered furniture, mattresses, carpeted stairs, etc.
  Crevice Tool for cleaning tight spaces, corners and along edges.
  Air-Powered Hand Tool for cleaning upholstered furniture, mattresses, carpeted stairs, etc.
• Onboard tool storage for quick tool reach, neat storage and avoid tool losing.
• Carry 2-year limited warranty.

You can comment below if you know other difference between UH30600,UH30301 and UH30300.

Some key difference between Hoover UH70210 and UH70100 is handle design, cord winding mechanism, headlight, and brushroll switch.
** The UH70210 has a folding down handle while the handle on UH70100 is not foldable.
** The UH70210 is equipped with auto cord rewind while the UH70100 does not feature automatic cord retractor.
** The UH70210 has a headlight while the UH70100 does not have.
** The UH70210 features suction only mode while the UH70100 has no brushroll On/Off switch.
More specs comparison, read the table below:

Compare Hoover UH70100 and UH70210

	Hoover UH70210 WindTunnel T-Series Rewind Plus Bagless Upright Vacuum Cleaner	Hoover UH70100 T-Series™ WindTunnel® Pet Bagless Upright
Design	Upright	Upright
Price	$159.99 at Hoover.com on August 12, 2014	$119.99 at Hoover.com on August 12, 2014
Bagged or Bagless	Bagless	Bagless
Cord Length	25 ft	27 ft
Auto Cord Rewind	Yes	No
Amps	12 Amps	12 Amps
Motorized Brushroll	Yes	Yes
Suction Only Mode	Yes	No Brushroll cannot be turned off once vacuum is on.
Height Adjustment	5 Manual Settings	5 Manual Height Settings
HEPA Filtration	Yes	Yes
Headlight	Yes	No
Weight	17.8 lbs	15.7 lbs
Cyclonic Action	Dual Cyclonic Air System	Dual Cyclonic Air System
WindTunnel Technology	Yes	Yes
Performance Check Indicator	Yes	Yes
Nozzle Width	13.5"	13.5"
Edge Cleaning Brush	No	No
Bumper Type	Scuff Guard	Soft Touch
Self-propelled	No	No
Grip Type	D-Shaped Handle	Standard Grip Handle
Folding Down Handle	Yes	No
Hose Type	stretch hose	stretch hose
Hose Length	8'	8'
Included Tools	Air Powered Hand Tool, Crevice Tool, Dusting Brush, Upholstery Tool	Air Powered Hand Tool, Crevice Tool, Dusting Brush, Pet Upholstery Tool
Cleaning Wand	Yes	Yes
Color	Light Blue	Blue
Warranty	2 year limited warranty	2 year limited warranty
Manual	download manual	download manual

Overall, the UH70210 is a better choice though it costs more.
If you have more info to share on these 2 Hoover upright, please comment below.

The apparent difference between Hoover UH70210 and UH70240 is the Handle design and the color.
** The UH70210 features a folding down handle while the handle on the UH70240 is not foldable.
** Primary color of the UH70210 is light blue while the blue color on the UH70240 is darker.
** The UH70210 features Dual Cyclonic Air System while the UH70240 features Multi-Stage Cyclonic Technology.
They both have the retractable cord and suction only feature.

Compare Hoover UH70240 and UH70210

	Hoover UH70210 WindTunnel T-Series Rewind Plus Bagless Upright Vacuum Cleaner	Hoover UH70240 WindTunnel® T-Series™ Pet Rewind Bagless Upright
Design	Upright	Upright
Price	$159.99 at Hoover.com on August 12, 2014	$127.49 at Hoover.com on August 12, 2014
Bagged or Bagless	Bagless	Bagless
Cord Length	25 ft	27 ft
Auto Cord Rewind	Yes	Yes
Amps	12 Amps	12 Amps
Motorized Brushroll	Yes	Yes
Suction Only Mode	Yes	Yes
Height Adjustment	5 Manual Settings	5 Manual Height Settings
HEPA Filtration	Yes	Yes
Headlight	Yes	Yes
Weight	17.8 lbs	not specified
Cyclonic Action	Dual Cyclonic Air System	Multi-Stage Cyclonic Technology
WindTunnel Technology	Yes	Yes
Performance Check Indicator	Yes	Yes
Nozzle Width	13.5"	13.5"
Edge Cleaning Brush	No	No
Bumper Type	Scuff Guard	Soft Touch
Self-propelled	No	No
Folding Down Handle	Yes	No
Hose Type	stretch hose	stretch hose
Hose Length	8'	not specified
Included Tools	Air Powered Hand Tool, Crevice Tool, Dusting Brush, Upholstery Tool	Air Powered Hand Tool, Crevice Tool, Dusting Brush, Upholstery Tool
Cleaning Wand	Yes	Yes
Color	Light Blue	Blue
Warranty	2 year limited warranty	2 year limited warranty
Manual	download manual	download manual

If you know other difference between UH70240 and UH70210, please share it below, thanks.