system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Why is it that Superman tends to get flung the same distance as Batman if they're fighting the same opponent?

If someone's strong enough to throw Superman across a room, wouldn't they be strong enough to rip Batman to shreds with a finger? Or does Superman have roughly the same mass as a human, just with much more durability and strength?

Citation: last battle in last episode of Justice League Unlimited. I realize comics/movies/cartoons each have their own separate canon, but answers for each are welcome.
gpt
Superman seems to have the amount of mass we'd expect from his appearance if he were human and not kryptonian. Notice that when he's Clark Kent his body does not affect the environment in any noticeable way. Contrast this with FMA's Envy, whose human form still retains the mass of his humongous true form and sinks into the ground with every step and bends the metal railings he steps on. Also, as a young Clark Kent, his parents were able to treat him like any human child, the farm isn't buffed structurally or anything.