Supes has dealt with him, but nothing as blatant as the beatdown in Trial of Superman. Actually, they fought three times in Trial, under three different writers, with it going back and forth the first time, Supes stomping him the second (After separating him from the planetary power grid), and a mind possessed Cyborg stomping him the third. The fight from Return of Superman might look like a straight stomp for Supes, but remember Eradicator fried him pretty badly before. In Hunter/Prey, Supes was amped and still couldn't keep Hank down, until Darkseid finally stepped in.
I just uploaded every Cyborg Superman fight from Trial.
First, how he does against the three other Supermen from Reign of the Supermen (Plus pocket universe Supergirl).
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Goes through them like a hot knife through butter. And Eradicator alone could probably give Gladiator a tough fight.
Now, onto the Cyborg Superman vs Superman fights. Round 1:
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"You weren't listening!"
Looks like Hank more than held his own, and he had some nice durability feats, including bouncing right back after getting fried, while Supes ended up KOed after enduring less of a jolt.
Hank takes over the entire planet, and burns down the neighborhood. Actually a pretty fun story for Cyborg Superman, but also kind of kills Hanks credibility since he can't even kill Supes with a planets worth of power backing his attacks.
So Superman goes from shrugging off attacks backed by a power grid designed to power a techno planet, to getting one shot KOed by an eye blast? O_o
Now, granted, this was Tribunal Prime jacking Cyborg Supermans body, so technically it's not Hank doing this to Superman. But, it's still purely all Hanks power. There's zero proof the body jacking somehow amps him, and even if it did, it's highly unlikely he'd be more amped than when he jacked into the planetary grid..
I'd like to know what Jurgens was thinking, out of the three different writers.. Does he really put Hank that far above Superman? I'd like to think he was still hurting from the last fight, but the way Jurgens wrote it makes me suspect whether he even knew what was written in the last arc.. ^_^;
Well, obviously, Hank was intended to be the most powerful of the Supermen who replaced Kal during his "death". And Jurgens' view isn't all that extreme considering Hank has Kal's DNA, giving him the Kryptonian powerset (which in of itself, I feel is inferior to Kal's, but enough for him to take notice) as well as Hank's technopathy, which is probably the best in comics.
I'd say Hank's degree of technopathy + even a watered down Kryptonian power set (which I don't think is that watered down in comparison to Kal's as it is based off of his own DNA) should match Superman at least.