First off, this is in no way a thread about Battlefield 4. I don't think this is necessary to post in the Battlefield 4 sticky. The video happens to be featuring Battlefield 4, but its purpose is to compare systems.
IGN has made a video that compares different versions of Battlfield 4.
1) Current Gen vs. Current Gen
2) Current Gen vs. Next Gen
3) Next Gen vs. Next Gen
What looks the best to you?