Interesting scenario.Godzilla 1998 is my favourite movie and with my family and relatives was hoping for a sequel after we watched it. I watched the japanise Godzilla onli as kid, now I think it for fatt, clumsy and ugly and they always invent it some abilities like in Dragonball Z, only to make it invincible.
The american one looks predatory and agile like raptor, what is more evolutionary correct by my opinion.