Incall: More risk (possibly) of LE for the client, less for the provider; may be more expensive to cover the cost of the room; may be less convinient for the client; may be more comfortable for the provider; could possibly add to the thrill of the experience

Outcall: More risk (possibly) of LE for the provider, less for the client; may be more expensive to compensate for this risk and/or for travel; more convenient for the client; may be more comfortable for the client; could possibly add to the thrill of the experience

Incall is best for quickies; outcall is best for GFEs. If you can risk an arrest and have no privacy at home, go incall. If you don't mind a stranger in your home and want to be more relaxed, go outcall. I have a hard time concentrating when I'm in a bed that I know has jism from past clients touching my ass.