That's pretty much it! I thought an AD may only carry one brand, whereas a Boutique carries many. Both have full mfgs. warranty as opposed to GM where it may be only the GM's warranty and not recognized by the mfg. I.e.; my high end local jewelers carry 2 or 3 brands w/full mfg. warranty..., are they considered a boutique, even though they sell a lot of jewelry, etc.? Someone in another thread mentioned that the Boutiques are more "fun" (my word) and harder to come by. So, what's the diff.??