ASUS Vivo Tabs - what is the difference between models?

Can someone tell me what the difference is between the ASUS Vivo Tab ME400C and the TF810C? One sells for $500 and the other for almost $800. One has an 11.6 inch screen and the other a 10.1 inch.. but other than that they look pretty much identical. Same resolution, both atom 1.8GHz processors.. I just don't get the huge price difference.

http://www.amazon.com/VivoTab-Smart-ME400C-C1-BK-10-1-Inch-Tablet/dp/B00AA6OVLI/ref=sr_1_4?ie=UTF8&qid=1360550266&sr=8-4&keywords=asus+vivotab

http://www.amazon.com/ASUS-VivoTab-TF810C-C1-GR-11-6-Inch-Tablet/dp/B009F1IOJO/ref=sr_1_1?s=electronics&ie=UTF8&qid=1360550585&sr=1-1&keywords=asus+vivotab

I'm starting to wonder if the amazon listing has an error on the specs of the 11.6, but they seem to mirror the ASUS website info. There's also a lot of confusing info out there that the 11.6 has a 1080p display, but that's incorrect according to the ASUS site.

Any ideas?