I've only been to Squaw a few times but my impressions are there's some steep stuff, plenty of expert and usually (last year notwithstanding) tons of snow. The point about being in Tahoe is a good one too, but taking that out of the picture Utah has a lot as well.
During a storm it's hard to explain what it's like in Tahoe - ask the Donner party, it ate them up
. They get absolutely killed sometimes up there with dumps. OK OK enough puns ... they can get a lot in a short period. Some of the snow removal equipment is kind of unique too. Tahoe certainly has the rep for heavier snow (more water laden) than Utah, but that has some advantages too (sticks to the steeps and stays in place usually). For some reason they don't seem to have all the avvie issues Utah does, probably due to the heavier more stable snow pack.
It's a tough call but I think you got to do it at some point because Tahoe is special.
While you're there, I too like Alpine almost as much. Northstar, which some call flatstar actually has some steep stuff they opened on the north side in the past several years. Heavenly has Motts and Killebrew canyons for steeps and nice views of the lake on the other side (as does Alpine). If you can get to Kirkwood I think they usually get the most snow but the road closes in weather. There are a dozen or so resorts up there worth seeing in a good snow year. I always wanted to ski Mt Rose chutes, haven't got there yet.