"One place in particular where you feel the difference is the special stage. We used the Mega CD’s sprite rotation abilities for that. Also, a single regular stage will have past, present, and future to contend with… we could only bring that volume to life with the CD format—if you do a simple comparison with Sonic 2, it’s 3x the volume. But when you add in the secrets and other things, overall, I think it’s safe to say it has about 4x the volume."