The Genesis version, which was released one year after the DOS version, isn't a port of the DOS version. It's almost a completely new game: it has new animations, sounds, graphics and adds player portraits. Moreover the DOS version has 10 1988-1989 teams while the rosters in the Genesis version are based on the 1989-1990 NBA season.
'88-'89 was Kareem Abdul Jabbar's last season so unfortunately he and his famous skyhook move are left out of the Genesis version.
While both versions are called Lakers vs. Celtics, it was actually the Detroit Pistons who won the NBA title in '88-'89 as well as '89-'90. Add
Did You Know?
If you keep pressing the fire key (or the Enter key) after a defensive foul, one of your opponent's reserve players throws an object to the court while you are trying the first free shot. Add