Originally posted by SurturI assume you are referring to Superman keeping away. That is true though I haven't seen Superman employ any such strategy in his fights. Though Godzilla Atomic breath would still hit Superman.
Even if he can't take him down he could potentially play keep away. Compared to Godzilla he's a very small very fast moving object.
As for the size difference it seems that people don't see this as an advantage for Godzilla. Godzilla movement alone would (especially if he was to swing his tail, jump or run) cause enough wind friction to throw Superman off or cause severe issues for him when flying.