Mega Drive :
IMHO the Megadrive Version looks and plays better. The controls on Amiga (like Retro said) are not good.
The Atari ST and Amiga versions of the game were released in 1990 by Virgin Software. Unlike the PC version, the Amiga version was not a port of the Mega Drive version but was virtually identical to the arcade game with no loss of colors or animations.
LOL look at the pictures and then dicide for yourself