If you see a provider offering both sensual and erotic... ASK THEM WHAT THEIR DIFFERENCE IS.
You can't beat communication with your provider. This should happen when booking for your best results.
When you meet your provider, most will spend a minute or 2 to welcome you... feel free to recap what you discussed... also, besides telling them what or how you like things, tell them also what you don't care for (too much chat, heavy pressure in a certain area,,, whatever). A good provider would appreciate the information. Clearer expectations also help the client relax and enjoy the massage.. instead of laying there trying to interpret every touch for a possible opening or "wait.. he just grazed my genitals... i wonder if I can now touch his?"