I'm not sure why WWH vs sentry is being brought up as proof of one stronger than the other. Sentry prior to Molecule Man fight was never using, nor understood his own powers. It was not until after the Molecule Man fight that Sentry understood his powers full potential.
So any argument of WWH vs a weak Sentry is pointless anyway. sentry simply was not using his full powers. He had no clue his potential till after Dark Avengers anyway.