I like them both. Both have their pluses and minuses, and I love the fast pace that they both have, but I'm leaning more towards RJ's as I'm a firm believer of Score > Song, and as awesome as "My Style! GekiViolet!" is, it's use actually takes me out of the battle, where as the Jungle Fury score, while not as flashy, complements the action very nicely.
Plus I still hate that damn random boxing ring.