In reply to neil0968:
For what? It all depends what you're after.
Glen Shee has better weather but thaws faster. Cairn Gorm has less terrain but more enticing ski-mountaineering options. Glen Shee has more for a really good skier who is actively looking for difficult pistes, and the best mogul field in Scotland (on the Tiger, when it's open, and when it develops). Cairn Gorm has better scenery, and as a rule, more dependable good snow, because it's higher. Glen Shee is better for queues, and has a wider variety of aspects...
Oh, and Glen Shee has revolting food. I don't know whether the food is even worse at Cairn Gorm, I've never risked it, but the Glen Shee cafeteria's pehs are minging
Post edited at 14:35