Malak and Bastila both state that end-game KOTOR Revan is far above Darth Revan. Then he becomes even more powerful when he's reborn and becomes even more powerful by SoR. So powerful to the point that it took that strike team to hope to defeat him.
Satele, Marr, Vizla, Beniko and post-Act III Protag > Darth Revan and Darth Malak.
@Petrus: No, because SOR Revan is Novel Revan with more intensity and half a brain. Darth Revan isn't behind Novel Revan by any significant stretch of the imagination, and is more like SOR Revan than anything. I just don't see much reason for any incarnation of Revan to be all that superior to another, and Karpyshyn further backs this up. 👆
@Sel: you'd have to be assuming that the gap between Darth Revan and SOR Revan is, like, bigger than the gap between Vader and Maul. And if so...😬