Below is info about some difference between Shark Cordless Handheld Vacuum UltraCyclone Pet Pro Plus CH951 and WANDVAC Handheld Vacuum WV201. If you are deciding between these two, maybe you would be interested in reading.

• Dust Cup Capacity
  They are vacuum cleaners for small messes and quick pick up, one thing you should take into consideration is the bin size.
  The WANDVAC WV201 has a very small dust container which holds up to 0.08 qt versus 0.45 qt on the CH951. The tiny bin requires you to empty it very often. If you do not want to empty the bin frequently, the WANDVAC WV201 does not meet your needs.
• Dock
  The WV201 comes with a charging dock for charging and storing the vacuum as well as the attachments.
  The CH951 does not have the dock for neat storage.
• Attachments
  The WV201 comes with 2 tools:
  a Multi-Surface Pet Tool for upholstery, carpets, and pet hair, and a Duster Crevice Tool for tight spaces.
  The UltraCyclone Pet Pro Plus CH951 comes with 3 tools:
  a motorized self-cleaning Pet Power Brush for hair pickup, a crevice tool for nook and cranny, and a scrubbing brush for tackling stuck-on dirt.
  If you have pet hair to pick up on upholstered spots, you may want to get the CH951 which have the small motorized attachment.
• Color Options
  The CH951 has only one color model in black with yellow whereas the WV201 has several color options.
• Weight
  The WANDVAC WV201 is very light, it weighs only 1.4 lbs. The CH951 is a lightweight hand vacuum too. But it is heavier than the WANDVAC, it weighs 2.8 lbs.
• Dimensions
  The CH951 is larger in size, it’s dimensions are 20.82″ x 3.82″ x 4.35″, the WANDVAC dimensions are
  16.5″ x 2.5″ x 2.4″ (LxWxH).

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Similarities:

• Both are handheld vacuum for dry vacuuming.
• Only one speed for all jobs.
• Not swappable battery, you can not buy an extra battery to extend running time.
• Carry 2 year limited warranty.

For more info, read comparison table below: