Clearly the Studios are a more rewarding experience, assuming a session with an ''equally-weighted'' Provider.
Where is the price point that moves male bodies from Studios to AMPs? Hard to say, and may not be that relevant.
If you already preferred Studios, the $20 won't flip you. $50 at GL could, I suspect. Remember, The AMPs already bumped from $240 to $280 in many cases, it's complicated and has been explained more than a few times.
Really, since May-June, prices everywhere have shimmied higher, some based on service upcharge. Maybe an equilibrium will occur by year's end?