Technically, he's beaten the greatest h2h fighter in the universe while only using his own h2h skill, so he's probably a better fighter than WW. And stronger, maybe faster...maybe. Smarter and more durable and most likely more powerful.
Her god'am lasso is all he needs to worry about. Which sucks, why should a character on Superman's level have a weapon that can't be broken by god himself and can hold anyone still forever?