Never played Odin Sphere, its like what game? I've played Muramasa and Im waiting for Dragon's Crown and their juicy melons.
Haha! Juicy melons! You wouldn't choose me if I were a VG character, so... my atributes are not that nice
To answer your question, Odin's Sphere is a very rare and unique game, with some artistic graphics that really impressed me back in the times when it was released. It's all painted by hand, like an ancient picture. If there's something that comes to my mind when I think about Odin Sphere is how beautiful it looks.
If you played Muramasa, you can have a good idea of how the game looks, sounds and plays. They are different, but it shows they are from the same developer.
Now Dragon's Crown, while artistically similar, is very different in gameplay because it adds deepness to the scenarios.