Heres she-hulk and hulk fighting at their current levels. Jen is easily able to hold her own, with hulk only gaining an upperhand by manipulating her by calling her "hulk", triggering her and throwing her off.
In terms of experience, reflexes, strength, durability, ingenuity I have to give it to Peter. In terms of combat tutelage, ranged blasts, investigation, and sex appeal, I kind of favor Jess.