Both times Kenobi had just finished beating on Opress when Maul ragdolled him. When he got blasted across the cave, that was only a few seconds after Obi-Wan was in an extended bladelock with both Brothers.
I agree the Maul is superior in TK. I just think judging that Maul can easily ragdoll Kenobi based on that fight alone is pretty harsh on Kenobi.
I wonder what Nicks opinion on Vader, Lukes, and Ben Kenobis skills are based on this scale. I would say Vader and Luke are solid 8s and Ben a 7.
__________________ "Vader's pulse and breathing were machine-regulated, so they could not quicken; but something in his chest became more electric around his meetings with the Emperor; he could not say how. A feeling of fullness, of power, of dark and demon mastery -- of secret lusts, unrestrained passion, wild submission -- all these things were in Vader's heart as he neared his Emperor. These things and more."