Personally an escort is not tied up by so many rules like messing up to many towels, getting oil on the bed covers, getting a knock on the door when time is up, being kept waiting for ages sometimes and even rules about how many times you can shoot your load!!!!!
But at least in a parlour there is a management so you can moan if not happy (Did 1 visit to madam beckys years ago the girl was amazing but spent teh full 30 minutes giving me a back massage then expected me to leave happy) !!!, the girls have normally been checked out by reputable parlours so there are no legal issues to worry about and you can have a second appointment straight after the first one with a different girl without getting dressed
Indipendents I always try to find one that also works in a parlour part time, or has their own website with lots of happy reviews on it