Cutera Coolglide Vs GentleLASE for Hair Removal

I have to choose between Cutera Coolglide or Candela GentleLASE. Which laser is more effective and fast? How many treatment do I need to decrease my hair or make my hair more finer? Can I reduce 50% hair with 2 treatments? I read, that it needs more treaments with ND Yag.

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