From the VideoGamer.com article: "The man behind Super Street Fighter 2 Turbo: HD Remix has admitted that the XBLA game-size limit imposed by Microsoft is causing development problems, sparking concern that there may be differences between the XBLA and PSN versions of the game when it is finally released.
SSF2T:HD Remix director David Sirlin revealed that developer Backbone is struggling to fit the new HD graphics into the 150MB Xbox LIVE download limit and admitted that including remixed music as well as the original music is proving "difficult or impossible"."