The difference between RIDGID VF4000, VF5000 and VF6000 are as follows:

These Ridgid replacement filters are designed for different purpose.
The RIDGID VF4000 is 1-layer wet/dry vac filter for general purpose everyday dirt.
VF5000 is 3-layer pleated paper filter features a double-pleated design that captures fine particles.
VF6000 is 5-layer filter made from HEPA-rated material for very fine filtration, it can removes 99% of all particles down to 0.5 micron from the air.

So, just choose the filter that meets your cleaning needs best.

Sone question and answers:

• Is a VF4200 filter same as VF4000?
  The VF4200 is 2 packs of VF4000.
• Is VF6000 washable?
  Yes. This 5 Layer HEPA filter is washable.
• Do all shop vacs use the same filter?
  No. Based on your cleaning jobs, you need to use different types of filters on the vacuum.
• How do I know if my HEPA filter is washable?
  You can read the label or consult the manufacturer.
• How long do washable air filters last?
  It depends. Some has specific time range of life, some can last lifetime. Consult the manufacturer for details.
• How often do you need to change the filter in a vacuum?
  It depends. Some need to change every 6 months, some last for one year, some last for the lifetime of the vacuum. But no matter how long the filter last, when there is wear and tear that affects the filtration, you should change it.
• What is HEPA filter?
  It is an acronym for “high efficiency particulate air filter”. This type of filter can theoretically trap and capture over 99.9% of airborne particles down to 3/10 microns.
• Is HEPA 13 better than true HEPA?
  HEPA 13 Medical Grade HEPA filters are a specialized type of HEPA filter commonly used in hospital settings, it can remove smaller particles than true HEPA.
• Can you wash HEPA filter?
  Some are washable while some others are not.
• Which is better HEPA or non HEPA filter?
  As for effectiveness, HEPA filters are more effective at capturing tiny particles than non HEPA filter, thus gives you better air quality.
  If you want cleaner air, a HEPA filter is better.
• What is the best HEPA filter grade?
  H14.
• Can I clean my air filter instead of replacing it?
  You should read the instruction. If the filter is washable, than just wash it and air dry before installing. If it is not washable, just tap it, use soft brush or some other cleaning tools to clean it. You should also learn the lifespan of the filter. Some filters need to be replaced every 6 or 12 months.
• Do expensive air filters last longer?
  Commonly, yes. More expensive filters usually are made of better quality materials, thus they are more likely to have longer lifespan.
• Can I reuse shop vac filter?
  Commonly, shop vac filters are reusable.
• What happens if you use a vacuum without a filter?
  You vacuum may get clogged and you will breathe in dirty air.
• What happens if you use a shop vac without a bag?
  For most shop vac, a bag is not necessary. You can use the tank only to collect dry or wet messes.
• Why does a shop vac have two holes?
  Commonly, one of the holes is for vacuuming, and one for blower function.
• How do I increase suction on my shop vac?
  If it has suction control, you can adjust the suction power. If it does not, then you have no way to increase suction.
• Why do shop vacuums lose suction?
  It can be caused by several reasons. Some common ones are: filter is dirty, this slow down the air flow; bag or dust cup is full; there’s something clog the air flow Path.
• Do shop vacs spread dust?
  It depends. If the filtration system does not seal well, the vacuum will spread dust.
• Do shop vacs get clogged?
  Yes, it is possible. Every vacuum cleaner may get clogged if messes build up inside the air path.
• Why is shop vac blowing out dust?
  This may be caused by full tank or full bag. If this is the case, then empty the bin or bag. If it is not the case, you can check if the vacuum leaks.

The main difference between Lefant F1 and U180 vacuum and mop robots are as follows:

• Suction Only vs Rotating Brush
  The Lefant F1 has no brushroll, but has a suction port at the bottom, whereas the U180 equipped with a floating main rolling brush which self-adjusts to adapt to different floor types. Suction only design will eliminate wrapping hair problems.
• Mopping
  The U180 has a 160ml water tank whereas the F1 does not have a water tank.
  So, how does the F1 mop without the water tank?
  You just wet the mopping pad and then attach it to the bracket.
• Dust Bin Capacity
  The F1 has a 600ml dust cup whereas the U180 has a 500ml bin.
• Auto Boost Intellect Technology
  Lefant U180 equipped with Auto Boost Intellect Technology which enables it automatically increases suction power from 2200Pa to 3200pa in seconds when moving from hard floors to carpeted surfaces for deeper cleaning.
• Max Suction
  The F1 can generate up to 4000Pa suction power whereas the max suction power of U180 is 3200Pa.
• Max Run Time
  The F1 runs up to 200 minutes while the U180 runs up to 150 minutes.
• Size
  The F1 is 2.71-inch in height whereas the U180 is 3.1-inch tall.
• Remote Control
  The U180 comes with a remote control whereas the F1does not include.
  The remote control is helpful if you do not have WiFi or App.
• Dust Bin Design
  The F1 has a clear dust bin which you can see through from the top of the robot, lets you know what it picks up and how full it is.
  For the U180, you cannot see through from the top, because it has a cover which is not transparent.
• Freemove Technology
  The F1 features Freemove 3.0 whereas the U180 features Freemove 2.0.

Some more information:

• Do they map your home?
  They can just create a real time map that shows you where it cleaned, however, they do not create a interactive map for you to use to get them clean selective areas or stop them from entering restricted zones.
• Do they support virtual wall?
  Unlike the Lefant M210,M210B,M213 and M213S, the F1 and U180 support magnetic tape.
  They come with magnetic strip that you can use to stop them from going into restricted area.
  However, there is no way to set barriers in App because they do not create a map for interactive use.
• Will they work without WiFi?
  Yes. However, without the WiFi and remote control, limited functions can be used.
• Do they recognize carpets while mopping and stay away from carpeted surfaces?
  No.
  You’d better use magnetic tape to stop them from moving onto carpets while using the mopping kit.
• Do they use lidar or camera?
  No.
• They use HEPA filter.
• They have two side brushes.
• They have anti collision and anti falling sensors.
• They can go back to the charging base to recharge themselves, but they will not continue cleaning where they left off.
• They can climb up to 15 degrees.
• They are backed by one year limited warranty.

The difference between the Bissell Spinwave Cordless 2307, 2315, 2315A, SpinWave Cordless Hard Floor Expert 23159 and SpinWave Cordless Pet 23157 are the color and what accessories are included, the machines are functionally the same.

• The Bissell SpinWave Cordless 2307,2315 and 2315A are Grey with Blue, come with one set of Scrubby Pads, one set of Soft Touch Pads, and two 8oz Multi Surface Formula.
• The SpinWave Cordless Hard Floor Expert 23159 is Grey with Blue, comes with one set of Scrubby Pads, two sets of Soft Touch Pads, two 8oz Wood Floor Formula and one 8oz Hard Floor Sanitize Formula.
• The SpinWave Cordless Pet 23157 is Grey with Purple, comes with one set of Scrubby Pads, one set of Soft Touch Pads, and two 8oz Pet Multi Surface Formula.

Bissell SpinWave Cordless Hard Floor Spin Mop Models Comparison

• These Bissell SpinWave cordless hard floor mops are designed for cleaning sealed hard floors, can be used on sealed wood, tile, linoleum floors, etc.
• They cannot be used to clean carpet or area rugs.
• They are powered by 18V 2000mAh lithium ion battery. The battery pack is not detachable. So you cannot buy an extra battery to swap and extend the run time.
• Charging time is approximately 4 hours, run time is approximately 20 minutes.
• All of them come with charging adapter, storage tray and trial size floor cleaning formula.
• There are many people wondering if they can use their own cleaning solution. Bissell indicated clearly that this may void the warranty. So, if you don’t care the warranty, it should be fine to use solution that can be used on sealed hard floors. But if you need the warranty, you can only use Bissell SpinWave cordless formula in your machine.
• They do not have a separate tank to hold the detergent only. You will have to pour detergent into the clean water tank before cleaning.
• They do not have a dirty water tank to collect dirty water. Water is absorbed into the mop pads.
• Any remaining solution in the clean water tank should be emptied before storage.
• Wet cleaning pads need to be removed from the nozzle after mopping.
• It is recommended to wash the mop pads after every use. They can be machine washed with warm water. But you should use only liquid detergents. Do not use
  bleach or fabric softener.
• If the floor looks streaky after cleaning, you’d better use one set of clean mop pads with plain water only to try again.
• All carry one year limited warranty.

Some questions and answers:

• Do these SpinWave cordless mops heat up the water?
  No, they don’t have a heater.
• Do they vacuum and mop?
  No. They do not vacuum.
• Do they steam the floor?
  No, they do not steam.
• Does Bissell offer disposable pads for these cordless SpinWave spin mops?
  At this moment, no.
• Do you have to keep holding down the button to run the machines?
  No. There is a On/Off control. You just need to press the button once to power on.
• Can you use the SpinWave with water only?
  Yes.