Originally Posted by The Architect
Nihilus would wipe the floor with Revan. Only someone who is a wound in the Force, a dead spot in the Force, like the Exile was, could beat Nihilus.
QFE. If he could wipe out whole planets of Force-sensitives, just one Sith Lord wouldn't be much of a threat... whether he was the 'cooler' one or not. Revan may be a powerful Force-user, but he really is just a regular one... which is exactly what Nihilus was best at killing. Revan's strength in the Force would only make him a bigger target.