Difference Between Mobos?!?!

I was checking out tigerdirect.com and I came across 3 motherboards that are priced differently 179.99, 199.99, 224.99. However they did say "Version A1, T1" for the higher priced ones and the lowest priced one was the regular, so what the diff. between A1, T1, and the regular?

Link

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2927686&Tab=2&NoMapp=0

T1

A1

Juding from this link here: http://www.evga.com/support/faq/afmviewfaq.aspx?faqid=57729

It looks like A1 + T1 are revision for the board to help OC quad cores better, but T1 has a lesser packaging.