A/N: so yeah, I've been hearing stuff that Snow Godzilla's design looks strikingly familiar to Godzilla's design in a teaser from Gemstone.

https://youtu.be/Q1kIANKjVEs

And after looking at the two:

I can certainly say that they are correct. As a matter of fact, they're actually using the Gemstone model for this anime movie. It's just less detailed and more white due to the snow theme of the character.