No idea how Superman wins, he's weaker, and all of his abilities are useless against Genos. Genos has a much better chance of landing his ranged attacks than Superman
with heat vision he can use to melt Genos while keeping a distance, shockwaves, and freeze breath to stop Genos in his tracks, and its unlikely for Genos to be able to get close to him for close combat when Superman has super hearing with planetary range and X Ray vision, meaning he can just fight at a distance while avoiding close contact with Genos.
You're ignoring the fact that Genos can fire homing lasers from his shoulders, and has massive energy attacks of his own. It's odd for you to give Supes the range advantage here.
Who would win in a ranged battle;
Superman: Thin laser vision that he doesn't spam vs Genos: A character with more powerful ranged attacks that home on the opponent and are also wider and therefore harder to dodge
Also, Genos can emit flames capable of vaporizing ROCK. There's no chance of ice holding him down. for long enough to do anything. Also that frost breath tends to have pretty short range.
His temperature manipulation would also likely allow him to resist Genos' energy attacks if he ever gets hit,
That's not how his temperature manipulation works. So no to that.
His flight means he could just BFR Genos in space.
So he has one valid win con. But on the other hand, there's no reason that the MHS+ Genos could just propel himself back to Earth within 24 hours.
TL;DR, I think Genos could win if the fight goes into close combat,
I'm genuinely confused. Genos uses melee a lot, sure, but he is more than willing to spam ranged attacks close up and far away, so this whole "he could only win at close range" argument holds no water. He would win at both with his 1.4x AP difference.
He has frost breath that wouldn't work against Genos and some shockwaves that are borderline useless given his opponent is stronger and the inverse square law exists. He has x-ray vision, but that's useless unless he's aiming for Genos' core, which he couldn't get his hands on.
range should earn him the win. Supes wins mid diff
I already discussed this, but I wanted to add that a weaker Genos has taken his own heat beams, (which are more powerful than superman's), while injured, and only his hair was damaged. So Superman's heat vision is kind of worthless.