I've just yesterday gone from xii to xiii and i find it amazing that it is so similar yet subtly very different. Things that where chainable/cancelable before are not anymore etc and the whole flow just feels smoother. Yet i do like xii, it is kind of like a modern sf2 where combos aren't really the big focus but instead it boils down to footsies etc.
No turning back now though, i can't leave my golden heel, ex moves and drive cancels.. Just too awesome. The flow, so good.
Btw. does anyone have a cool/favorite combo to share in xii? It took me a great deal of time to find the timing for it but i found out that Ryo could do s.D, cd, hcb d (+d), ranbu for serious corner damage. Then again, Iori and Robert can do about 10 more damage midscreen with basic combos hehe.