Has anyone seen Godzilla: Final Wars? Toho actually adopted the US version of Godzilla and named it Zilla, and had it attacking Sydney in the film. When the Japan Godzilla met him, hahahah.....well, see for yourself if you don't want spoilers:
http://www.youtube.com/w/%28JAP%29GODZILLA-VS.-%28USA%29GODZILLA?v=7Dyd2whEIoI&search=godzilla
What Zilla's got in speed he lacks in the weapons and durability department. He has no atomic breath and he is susceptible to conventional weapons. In fact, what he does is blow at things, causing them (cars, etc) to combust and explode..hardly a formidable weapon compared to that of Japan Godzilla.