Well, Gino is clearly not Godzilla. It be like if someone showed a Marvel fanboy a picture of a brand-new character, and told him it was Wolverine. It would clearly not be Wolverine, it would be it's own character, but not Wolverine.
This is all as far as I'm concerned, I know plenty of people are going to disagree with me, but that's none of my concern. I consider GINO(or whatever) a seperate character, in and of himself.
As a comic book fan, I've seen so many different characters passed off as so many different heroes, it doesn't matter anymore.
The American Godzilla is very much Godzilla in my opinion.
Now that you bring in comics, you bring up a concept that comics have known for awhile: the concept of a multiverse and of different interpretations of one character. I manage to reconcile the American Godzilla's difference because I accept that there is a multiverse, and thus, a multitude of different interpretations that can exist in the Godzilla franchise. We see this with the Showa-Heisei bridge and the Shinsei series.