i'm not sure how tough jessica is, but grace hung in there with sabbac and showed some ridiculous durability in the beating she ended up taking. she also caught and stopped a jet. 😐
unless something really big has happened to jess, grace kicks her teeth in. i might take grace for a majority over benjamin j grimm.....
From wiki- "She possesses superhuman strength, and, while its upper limits have never been defined, she has shown herself capable of lifting a two-ton police car with little apparent effort. Her strength allowed her to lift up a giant-sized Goliath by the nostrils and toss him a short distance, break Atlas's nose, and render her fellow superheroine Jessica Drew unconscious with a single punch to the face."
I think Jessica's *strength* isn't so far behind, but I'm pretty sure durability wise Grace has a reasonable edge. And I think Grace Choi is the more skilled fighter.
So, Grace.