These are 2 Hoover vacuum cleaners for pets, the difference between Hoover UH70085 and UH70210 are:

UH70210 vs UH70085
images from manufacturer

Handle:
The Hoover UH70210 equips with a folding handle that allows you to fold it down to store neatly while the handle on UH70085 is unfoldable.

Nozzle Width: The nozzle width on UH70085 is wider.
The UH70085 features 15-inch nozzle width while the UH70210 has 13.5 inch nozzle width.

Product Weight: Hoover UH70085 is heavier than the UH70210.
The Hoover UH70210 weighs 17.8 pounds whereas the UH70085 weighs 22 pounds.

Cord Length: The UH70085 has a longer power cord.
The cord on UH70210 has a 25 ft cord while the cord length on UH70085 is 28 ft.

Warranty:
The UH70085 carries 1 year limited warranty while the UH70210 has a 2-year limited warranty.

Color:
The UH70210 is a blue while the UH70085 is red.

Price: The UH70085 is $40 more expensive than the UH70210.
UH70210 is priced at $159.99 while the UH70085 costs $199.99 (prices from hoover.com, checked on June 24, 2013)

The similarities:
headlight for vacuuming dark corners;
eight feet stretch hose;
height adjustment with 5 settings
auto cord rewind to retracts cable automatically and allows cord stores neatly inside.
come with pet hair cleaning tool;
equip with HEPA filter to better air quality;
bottom empty dirt cup;
powered by 12 amps motor;
system check indicator to warn you to check filter and dust cup when it is needed.
beater bar can be shut off by touching a foot petal for cleaning bare floor.

To learn details, you can download:
UH70210 Manual: http://hoover.com/file/574/
UH70085 Manual: http://hoover.com/file/561/

We would appreciate you sharing info here if you know more difference between UH70085 and UH70210.