MSI GTX 760 4gb vs MSI R9 280x?

I'm torn between these cards. The R9 280x is a great card, it has a higher memory bus at 384-bit, and has 3gb of ram at a 6ghz effective memory clock, and will eventually have AMD's Mantle.

The 760 has 4gb of ram at 6ghz effective memory clock but has a 256-bit memory bus. But it has one more gig of vram, so does that put it at the same level as the 280x? I want the perks of Nvidia cards but I don't want to lose performance for it. They are also the same price so I just don't know which one to go for.

Any help would be greatly appreciated.

Links to the cards:

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127759

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127748

280x is better

look for cheap gtx 770s

GTX760 cant actually use more then a bit more then 2GB (2,2 or 2,6GB if I'm not wrong) so don't buy the 4GB version.

I would do as ROK says and look for a GTX770 or go for the R9 280x.

Alright thanks. I'll be live streaming and I want to get a lot of frames being I'm getting a 144hz monitor. (I'm getting a 3770k) Do you think I'll get at least 70 fps? I will be streaming BF4 mostly.

Depends on settings and what you will record your gameplay with. But with a GTX770 it will not be a problem on something like medium I think. (please note that I'm not that good at streaming stuff)