That's really hard to say. Both play identically so you really can't go wrong. That said, I'm not very fond of the music replacements in Dynastic Hero. Some of it is pretty good, but the majority of it just doesn't seem appropriate to a Monster World type of game. But Dynastic Hero does have slightly better colors in a few spots, but lacks parallax scrolling.
Dan, no I haven't heard of it. I was considering including some of the Tec Toy spite hacked Monica versions (or whatever they're called), but decided against it.