I really like both but I think the 2nd one is more powerful because it looks like more power is about to be put into her strike on the sword. She's getting an extra power boost it seems form the sorceress and the angle of body implies that more force is needed.
As far as what is more interesting, that is a bit harder to pick because comp 1's story in my opinion shows how delicate she is with her work to make this amazing weapon compared to comp 2, which tells a different story of how she has to approach making this awesome sword. So for me it's about what story you find more interesting.
You have a great comp and the base colors are looking to add to the epicness. If I gotta choose 1 then Composition 2 might be the go to.