Damage soak helps because the fight will last for quite some time before Cap even gets the chance to TRY and choke Frank out.
He is faster, stronger and more skilled, I agree. Doesn't mean Punisher will just stand there and let Cap do it. Frank is a very skilled fighter himself and it's not out of his character to knee his opponents in the balls, bite their ears off while in clinch or poke their eyes out. He's not going down without putting up a great fight.