Differences in HP photosmart 7760 and 7760w?

[DonIsHere]

What's the difference between the HP Photosmart 7760 that is sold at Staples and the HP Photosmart 7760W that is sold at Costco?

 

[nanyangview]

the one with the W has a auto duplexer unit which allows you to print double sided.

other than that, they are exactly the same unit

 

[nanyangview]

oh and Costco Printers include USB cables and is not included in staples, cos they want to rip you off with their cable