Re: The Deadliest Woman in the Galaxy: The Gamora Thread
In the comics, Gamora's power level has varied, but generally I'd say she has maybe class 40-60ish strength, similar durability, and some low level ( non-combat ) regeneration. Maybe some enhanced reflexes, though I don't think there are any good feats to demonstrate it. Which is, amusingly enough, about the same stats as Sif has. So, comic Sif vs comic Gamora? Coin toss. They both are mid tier bricks, they both are extremely skilled warriors, they both wield superhumanly potent swords.
For the movie versions? No idea. We obviously haven't seen Gamora yet, and we don't have a lot of good feats for Sif. If I had to make a guess, I'd say the movie version of Sif would win, but that's based on extrapolating where Sif ranks in brickiness relative to other Asgardians, and guessing how powerful they are likely to make Gamora.