> I believe it's made by the same guys as Guilty Gear..... also the same engine.
No, Arcana Heart is developed by Examu (the guys who made Samurai Shodown V) while Guilty Gear was made by Arc System Works (BlazBlue series, Fist of the North Star, ...).
I don't think the engine is the same as the games look very different and are on different hardware. Technically what I regret in all Arcana Heart is that the background is not animated. :/