To be honest i dont think x box live arcade has really released anything retro that was really good yet saying that worms is on its way. The wii has the vc which is far better but again it should be with the licences it has. In fact Nintendo should have the retro scene all but 1. But there is a lot of for and against for both systems anyway 360 has a lot better graphics and online gameing Nintendo has games with mega gamplay i guess it depends what you are after from a gameing point of view. Im sure its a battle and one that will be spoke about on forums across the globe. But for me retro goes to Nintendo.