The one I just can't believe no one has mentioned....
HARDBALL!
C64 version was so awesome. Amiga version wasn't bad, but just never really captured what made the C64 one great.
And I totally agree, all the Epyx "Games" series were way better on C64. Summer Games, California Games, etc.
Also, agreed: Airborne Ranger may earn the title of Worst Port Ever!
Wow, did the Amiga version suck.
