Kenobi would seem to clearly have the edge in sabers. He clearly primarily used his saber in combat, has a number of great feats and accolades to his skill, and Traya was herself clearly more of a Force practitioner, and we have little reason to believe that she was notably good with a lightsaber at all.
That being said, Obi-Wan has to close the distance to be able to engage Traya in a saber match. Traya meanwhile can attack Obi-Wan with the Force at any range, and given Obi-Wan's defensive nature, is unlikely to "press" Traya in a lightsaber battle and keep her from using the Force against him if he manages to close the distance, when that would otherwise be a viable strategy.
So I believe the question is whether Traya can decisively win this contest through the use of the Force and not allow Kenobi to turn this into a lightsaber battle.
Which I will get to later after seeing a few more posts.