^ Link with size difference.
Cloverfield escapes from New York City and heads towards Japan to get away from the US Military. He starts to attack Tokyo is destroying it with ease. Godzilla rises from the ocean, roaring and goes towards Tokyo to confront the Cloverfield Monster. They both meet up and fight each other in the middle of Tokyo. Only one will come out victorious.
Who wins?
Clover's body is poorly designed and would be easy for godzilla to cripple because of such. Long spindly leg-arm-things that godzilla could easily grab a hold of and snap? Yeah clover isn't going to last long.