Also is not to rule out other physical stats outside of strength, like stamina, durability, agility, speed. They might be more skilled as a h2h fighter or whatever else, but if they aren't fast enough to react what does it matter? Or is it possible that they don't need to be fast enough to react because they're durable enough to take anything to dish out, like Darkseid if Im not mistaken isn't faster than Superman but he's durable enough to take what Superman can dish out.
Maybe they're durability wouldn't matter against a more skilled opponent because they know how to attack a person's weak points, they may have a HF or something, but that doesn't matter if they can attack with nerve strikes, pressure points, chi blocking, etc.
Stamina is also important. You may be evenly matched in absolutely every aspect, but if you can outlast them in a physical confrontation then they may not be able to take you. They'd be forced to end it quick or lose.
Also can't forget the different aspects of "skill" if youre a skilled marksmen as I already mentioned, maybe you can use that to your advantage over someone who is physically superior or even someone more skilled in other aspects than you.
Then there's tacticians like Cap, Slade, Batman, etc. If you're able to think as well as you fight, staying ten steps ahead and plan out every move sometimes you can beat your opponent mentally as well as physically. Slade is able to play mind games with his opponent, it's actually how he gets to Cass and Rose often. This works with preperation as well as being a quick thinker on the fly.
I just wanted to expand on what I had to say before. There's so many factors in every fight that have to be considered, location, distance, equipment, what mental state the characters are in. It's not just about skill or stats.