Bandai Namco's producer has said that Accel World vs. SAO will be the final SAO release on Vita. Based on those retailer charts, it looks the Vita version has outsold the PS4 one, despite having an anime-like frame rate. The series is so popular in the west that this entry is being released as a PSN-exclusive on both platforms in North America.
RIP Kirito
Well, the blogger, that is the one that matters since is the nationwide sell-through, said PS4 > PSV (first day). Probably not much difference, probably something like this might happen:
01./00. [PS4] Sword Art Online: Hollow Realization # <RPG> (Bandai Namco Games) {2016.10.27} (¥7.200) - 70.871 / NEW
02./00. [PSV] Sword Art Online: Hollow Realization # <RPG> (Bandai Namco Games) {2016.10.27} (¥6.100) - 69.648 / NEW <66,53%>
<1k difference