Easiest answer ever...SLC! Snowbasin, Snowbird, and Alta are some of my favorite ski resorts and Winter Park is probably my least favorite. I just got back from my third trip to Winter Park...while I did find a few spots that I enjoyed, it has nowhere near the terrain variety that the SLC spots have. The only thing it might have is more glades. Otherwise, SLC wins! Someone earlier mentioned that Winter Park has WAY more groomers than Snowbird. I would beg to differ. It may have more beginner terrain than Snowbird, but the type of groomers I like (Regulator Johnson, Junior's Powder Paradise, Chip's Face) can be found at Snowbird...the only steep groomers at Winter Park are Sleeper (which really isn't steep) and Lower Hughes. I know lots of people love it, but I think everything at Winter Park is overrated (including their mogul runs).