Help me decide between these graphics cards

The Conscript

Reputable
Nov 26, 2014
9
0
4,510
Currently have a GTX 760, looking to upgrade to GTX 980. I have two in mind below. One's 780$, the other is 660$. Same brand, and the cheaper one is actually marginally faster.
1) Why the 110$ gap? Surely the cover/backplate can't be only the reason?
2) My GTX 760 is PCI Express 3.0 x 16. Can I get just a PCI Express 3.0?

Most expensive to least expensive

http://www.newegg.ca/Product/Product.aspx?Item=N82E16814487068&cm_re=gtx_980-_-14-487-068-_-Product

http://www.newegg.ca/Product/Product.aspx?Item=N82E16814487079&cm_re=gtx_980-_-14-487-079-_-Product