Maybe because Indominus is a bit closer looking to Shimo and we dont have puppets of shimo at all. Im refering to the StinkyBlueRat Video with the puppets of G-Man and Monke. But tbh i do not know any other creator that uses Indo for Shimo.
Godzilla singing is the most perfect thing and also nobody talks about how strong dog is I mean sure Kong is not putting his all in but still this motherfuker at full strength without any thing holding him back could probably out muscle Godzilla pure muscle no atomic breath involved because that's just cheating