Did Crystal have any park? I was there in January and it was a kiddie park.
I found Crystal to be more freeride and technical steeps on the right side (looking at the mt from the parking lot) and very technical on the backside. We were about to drop in when Patrol warned us not to, then closed the rope. We went to the front and it wasn't much easier.
My legs were burning and it was the first major session of the year for us.
Stevens is closed, but I found it to be pretty cool. Mellow at spots, and steep at parts. A little in between but not much. I liked the terrain at Stevens for the conditions better, but I would have a lot of fun at Crystal if it snowed that's for sure.