from my own personal experience with crystal (which was retarded at best on my part) - I lost close to half a pound a day on 200mg crystal, and then upped it (too fast) near weekends to 600mg (3 caps in an hour) and then had to stop it due to the heat.
lost 10 lbs and was far more cut after that than previous cycles with the powder kind - but that might have been due to the extremem bloat I got on crystal and then it just looked like I was more cut once that went away.