Laser hair removal at a plastic surgeon's office vs a spa service?

I recently started laser hair removal from my chest at a plastic surgeon's office where each treatment costs approx. $375. Today I saw an ad for a spa service with aestheticians and their cost is $175 per session with a special price of $185 for six treatments. Big cost difference. The spa service uses a Fatona laser system. Not sure about the plastic surgeon's office. Is there a difference in hair removal services? It seems to me that laser hair removal is laser hair removal where ever you go.