Had a great time in both last year.
3-4 days at lake that were just amazing. We were at the peak when they opened up the back bowls.
Same thing for SunShine... Had a lot of fun in the South Chutes.
I agree hat SSV gets more snow, but lately I've found it a bit easier to find stashes at Lake. SSV feels like it gets tracked out fast, whereas my good days at Lake were just endless freshies with just a little bit of extra work.
SSV defnitely has better lifts though.