Interesting...
Ogata is the only one credited for the After-6290 Mix where another part of the list shows that two names could be assigned to a game instead of just one. In addition, since Alph Lyla is used for the SFII':SCE tracks, then either composition or arrangement with regards to the original music (but surely not both) would be utilized here.
http://www.youtube.com/watch?v=BzfmF...eature=related
Unfortunately, samples from Sonic - You Can Do Anything had to be in the mix.
Otherwise, what's heard in the mix corresponds to these...
-Special Stage (confirmed as Ogata's through a special set of in-game credits, but that information wouldn't be nearly as public as opposed to that found in the end credits (For Sonic - You Can Do Anything). As such, I feels it provides justification that the rest as Ogata's.
-Wacky Workbench (all versions except Past, but closest to Present)
-Tidal Tempest (All versions, but closest to Bad Future)
-Collision Chaos (Past and Present, closer to Present)