There is no way to tell how much stress on the GPU's Battlefield 4 will provide. If it's a performance increase of like 15%-20% then neither cards will be good for ultra 5760x1080p. Your best bet would be 770sli from these two options, as they are 40% better than a titan and deliver. Probably 2 GTX770 gigabyte 4GB windforce 3x will suit you best, due to the fact that sli-ing doesn't add VRAM, so you are stuck with 2GB of VRAM(which is more than enough for modern games, unsure for future games.)
Your call.