If you were to take Brackett Basin out of the equation, which resort has the better tree skiing?See, I'd much rather ski SR on a groomer only day than SL. Not because of the terrain, but because they have more lifts and they have less wind issues.
At SL, if you are an advanced skier, you are basically skiing off of three lifts only during groomer days; King Pine, Skyline or the Superquad. Any one of those lifts goes down and you are in for a long day of frustrating lines.
Contrast that to SR where you have White Heat, Barker, Spruce, North Peak, Aurora and Jordan. Even Locke and Oz will likely spin if crowded. So, it's just easier to avoid lines / crowds. I don't mind waiting in longer lines to ski trees or bumps, but if it's groomers only I get frustrated with lines.