Rebels Ahsoka vs LOTF Jaina

Force
Sabers
All Out

Possibly a draw.

Ahsoka

Assuming similar speed levels for Canon and Legends, Tano.

Depends on how well you can see Jaina performing against Canon Vader in this incarnation. I think she could replicate Tano's showing.

Ahsoka's better than garbage, so Ahsoka.

Ahsoka wins.