Solomon Grundy is a pretty powerful DC villain and especially in the DCAU. He got amped up during his final appearance and he was even able to trade blows with Superman. Abomination also got a power boost during the Chaos War and it was also pretty impressive. He was able to take on all of the Hulks at once and nearly destroy them all. Still, fighting Superman is a lot more impressive than that and Solomon Grundy’s raw power and stamina should definitely give him the edge. Solomon Grundy wins.