Some levels included with the 3 extra episodes on the CD version are indeed different on level design compared to the original 6 episodes, not that they made my experience with the game any different but okay.. Personally, if I name my top3 of the worst JJ1 planets, I'd say Pezrock, Fanolint, and Orbitus are the ones I name and none of those is in the A-B-C episodes. The beach planet with swimming and 'darkness' effect actually made me impressive back in the days and if I remember correctly, my favorite planet of all, Industrius, was in those episodes aswel. So I'm kind of happy with my late copy of the CD version..