HD 6670 GDDR5 vs DDR3?

Hello, I was wondering if there is a big difference when comparing the (Sapphire) Radeon HD 6670 DDR3 version vs the GDDR5 version. The DDR3 costs 80$ (65$ after the MIR) and the GDDR5 is 96$ (81$ after MIR). Will there be a big difference between the two? The highest end game Im planning on playing would be Skyrim (Not at a high res either as I have a fairly small monitor) Any suggestions? Thanks.

http://www.newegg.com/Product/Product.aspx?Item=N82E168... - DDR3

http://www.newegg.com/Product/Product.aspx?Item=N82E168... - GDDR5

Also if you suggest a different brand then Sapphire I would be glad to hear why Ive only bought one other card and that was from EVGA.