 The Megazord is a big clumsy robot suit. It moves so slowly I'm surprised whatever super-sized badguy actually doesn't get very many hits in. Prime would flatline that thing in a heartbeat. Actually, on the subject, are we talking G0 Optimus Prime, Armada Optimus Prime, Movie Optimus Prime, or Optimus Primal? First off, I think comparing a cartoon/CGI creation to a guy literally in a cumbersome robot suit is a tad unfair. Of course Optimus Prime always looks and appears faster, animation allows for things that would normally be bulky to move with a silky smoothness. For fairness, how about comparing Movie Prime v. Movie Megazord? Both are then big robots presented to us using CGI. Now, I think Optimus would still have the speed advantage, but the Megazord is no longer a lumbering collection of boxy animal shapes. However, because the Megazord is composed of about five different entities each about the size of a car or truck, I think it would have the mass/strength advantage. (I really have no true evidence to back this up, but the Megazord does seem like a bruiser.) Both have swords, both have guns, BUT, only the Megazord has a kill move, which I think the fight would boil down to. Do we allow the final strike to be used, and if so would it be an instant KO for the 'Zord? 