I doubt there's anyone on this forum who has skied both McConkey's and Schmidiots. I certainly haven't--or anything remotely in the same league. But according to the source Squallywood--High Line on McConkeys is the hardest (legal) line on the mountain. The lines on the Tram Face are shown in Squallywood but not rated-possibly because Gaffney hasn't skied them or doesn't want to admit to it. That face is permanently closed. Apparently they tried opening it once but Patrol spent all day doing technical rescues. Rumor had it they were going to use it for the FWT a few years ago, but it isn't clear to me if they actually planned that or were just trying to hype the event. They did try to use Lemming Face, just around the corner looker's right from Tram Face but decided against it due to avy risk.
The hardest line I've managed at Squaw is Main Chute, and that was in very high snow--the center rock covered. There was a goat trail in, one hard turn, one not quite so hard turn, and then straightforward. Even so I was so adrenaline depleted I could barely make it down Shirley afterwards. Interestingly, Squallywood rates Main--and a few other lines--harder if you turn than if you straightline it, although for me turning is easier.
The Squallywood lines are very short--usually involve a straightline, an air or two, maybe a rock to dodge and maybe 15 seconds of skiing at most. Super athletic but very different than a long tight tree line or a long no fall couloir. Like the difference between a boulder problem and climbing Everest. Hardly the same sport.