I'm pretty certain an Escort is technically just a woman who would accompany you for an evening out. They aren't supposed to end the night in your hotel room.
A call girl on the other hand is intended to show up and provide sexual service.
---------- Post added 2012-12-28 at 09:13 PM ----------
Troll or not, the topic provided a subject worthy of discussion. Even if it is just hypothetical. I mean we have threads going 50 pages about ancient aliens, come on. lol