Presumably Superman's ability to deal with Kong would be on a par with his ability to deal with Titano. Since I assume most Titano stories are not just a few pages long, it stands to reason that it would be challenging for Superman.
As for Godzilla, you've got the added complication of the atomic breath. Also, Godzilla isn't just a brute-force fighter, but is cunning and creative and has a way of rallying back with a surprise move when he seems to be down. Superman would have to watch himself.
As for Godzilla, you've got the added complication of the atomic breath. Also, Godzilla isn't just a brute-force fighter, but is cunning and creative and has a way of rallying back with a surprise move when he seems to be down. Superman would have to watch himself.