[J.R.]

You also have to consider your game selection, so while in theory a better player has a bigger edge at no-limit than in a short-handed limit game against the same opponents, those profitable-to-play-against opponents might not play no-limit. If the no-limit game only attracts good no-limit players, it won't be very profitable. And as you mentioned, each game takes different skills, so one might be naturally better suited to play one game or another, or might not want to sepnd the time to master the other game given there current profitable situation.