In the latest episode of The Inbox, Logan and Maks informed us that this generation's AMD cards have a higher latency than Nvidia's. Nvidia cards are currently "smoother-looking" than AMD's, even at lower framerates.
AMD made an announcement today stating that drivers will soon be out to fix this issue. Looks like AMD is going to catch back up again and level the playing field :) I'm looking forward to some smoother gameplay on my 7870
Source: http://www.techpowerup.com/178129/AMD-to-Fix-GCN-Latency-Issues-with-Driver-Updates.html