@ Gojira Prime...yeah that height I had looked up to see what it was and not too shabby. It should at least come around the neck area on the Gojira adult.
@ Baltan II...yeah I see the difference there. That is the Moge-Goji head. It might be the somewhat side angle too that makes him look leaner. If we can see a complete side pic, then we can see how the rest of him fills out in body form. That pic you posted does show a head difference.
EDIT: Looking back at the prior posted pic, the body is more like the movie still you posted Baltan. It is that new angle shot that makes him look off somewhat in the body.
EDIT #2: Speaking of heights, if they were to get on with completing the Godzilla vs. King Ghidorah movie with Godzillasaurus, I wonder if we would be looking at this body design primarily with maybe a shorter height? Interesting, but would a Godzillasaurus even sell and have a certain collector appeal? Hmmm... *well laterz...off to bed*