User blog comment:Radionatix/Who is the most powerful Godzilla villain (This time I want the real answer)/@comment-25285745-20160216161346/@comment-1060835-20160216215446

Just going to throw this out here, Toho did say it was the same Gorosaurus. And that the IDW Kaiser Ghidorah had different origins, due to Toho demanding that all their kaiju have different origins to be used in the comics.