If you watch the above video captured by Shiyun, you can see that SAO: Hallow Realization runs quite poorly on PS Vita. Frame Rate’s being very low and input lag seeming to be common show how badly the game plays on PS Vita. PS4 version footage released looks far better and if these issues don’t get fixed on Vita in time for the NA/EU launch next month, I highly advise you get the PS4 version.
But it is a shame to see the PS Vita version suffer such poor frame rates, as Hallow Fragment and Lost Song ran perfectly fine on Vita. I am hopeful that Bandai-Namco releases a patch that fixes this frame rate in the future and if they do, expect 3WIREL to report on that.