Hi, I'm new here, but I am not new to the fight, haha.
I think Stephanie has a much stronger legs than Beyonce ... Because her training as a skater is much more demanding, hard, continuous... acrobatics also need a lot of control over the legs.
Beyonce's legs its fatter, it's true. But they dont have the same force, obviously, look at the muscles of the legs of Stefanie.
Stefanie is likely to destroy, with effort, to Beyonce.
Greetings.