The definition of PSE varies just as the definition of GFE varies from individual to individual. The best objective definition of GFE that I have heard comes from a gentleman by the handle of St. Bart on another board. It requires at least 3 things: DFK, BBBJ and no-rush. No rush can mean different things to different people so I like to add multiple pops. In "St. Barts Rating Scale" a girl starts out with a 10 GFE ranking and you count down 1 point for every requirement she is missing. I think this is the closest thing to an objective ranking system that I have ever seen.
As for the original question about a PSE, I agree with the poster that said we should expect a Porn Star performance every time because that is what we are paying for and they are
SUPPOSED to be professionals. Some guys only consider gals that have at least appeared in adult vids as qualifiying for a PSE. Others think that they have to at least be of the caliber to appear in one, meaning there are 9's or above in looks. Having been with several actual porn stars myself, I would have to say that they're usually great at what they do but not necessarily any better than many regular "working" girls that I've been with as well. So what is the real difference between a PSE and regular encounter?
Here are the "St. Prolijo PSE Rating Scale" requirements: a) they expect to get paid more than other girls just because they consider themselves Porn Stars, b) they expect you to present them with your HIV test results before doing any further business, c) they refuse to do any fluffing (meaning you get yourself hard), d) they expect to be the center of attention, e) they're great at faking orgasms, f) they expect you to pull out just before you come so everyone can see your leche and g) you worry for months afterwards if they had ever gone bareback with Darren James (a recent porn actor with HIV). Start from 10 and count
UP 1 point for every requirement that is missing.
Seriously, I think the main difference between a GFE and a PSE is that a GFE doesn't have to be a 10 in looks, but she does have to be more than just business.