"Right now, you may think that your current 60Hz or 120Hz panel provides a great experience. I know I did. My tune changed from the moment I started playing Battlefield 4 multiplayer with G-SYNC enabled. "
AMD:
- Mantle
- 4GB VRAM (780 has 3GB)
*More than 3GB is not needed yet. No idea when/if. Lots of articles online.
I don't consider Mantle a big deal since only BF4 currently supports it. I consider G-Sync a far bigger deal.
Both are great cards and you'll be happy but my advice is go with the EVGA 780 unless you can come up with a solid reason to go with the AMD solution.