I've skied Big White and Silver Star. Big White is currently my home mountain.
Silver Star: Banger park for the most park. Doesn't have a park chair like Big White does. Lift lines get super busy since the Comet is the main lift which takes you to the park. The backside of Silver Star has some good terrain, I'd stay away from there if their hasn't been any new snow for a while. For groomers, Star has some good fun groomer runs.
Big White: Doesn't have 1 main lift so you can access good groomers from every lift. Big White's park is so banger right now. Has a park chair but can get busy at times. All the other lifts are busy, but if you go in the singles line you don't have to wait. Gem Lake has some pretty good terrain, also the Cliff. If you want to hike, there is East Peak which is about a 30 - 45 minute hike from what I've heard.
If you have any more questions, PM me.