I'm guessing the jcwhitney one is just a generic version of the Niken:

http://www.jcwhitney.com/digital-veh...terid=c26838j1

http://www.4x4.sg/index.php/product-...igita-attitude

Besides pitch and roll it also displays time and compass readings. I wonder if it also displays altitude? It's called an attitude display, but I don't know what that means, unless it has a mood ring function. For $16 it looks like a good deal and useful.