Mechagodzilla will win, though the fight will be close. The only reason that Godzilla keeps winning those fights is because of random fortuitous circumstances, or the help of others.
Mechagodzilla will put up a good fight, but his downfall will still be due to human error. I say Godzilla wins hands down. But Godzilla vs. Mothra - that's an entirely different outcome (I still say Mothra deserves a re-match).
Well Godzilla has been around for a bit longer, and has a better reputation. But with this said, the RRC does a very good job of ensuring more than adequate clinical experience and pathology. The one downside to Godzilla is that it's a 1 + 2-4 with the transitional year being required under the department of surgery. Other than this, the benefits packages look to be about similar with MechaGodzilla offering nicer facilities although I heard from the Godzilla PD that they're going to have their new peds ED open for the incoming PGY1's. So all in all, it's probably going to come down to location. 👍