for me PSE means that everything is on the table (rimming, greek, toys, etc) whereas GFE is like having sex with a really hot girlfriend who loves sex but may not be into the fetishes.  There is some subjectivity and crossover so it helps to think of it more as a general indication of what to expect in a session.

I say throw out the GFE and PSE acronyms, and just allow the ladies to fill out their own profiles on TER! In my opinion a gent shouldn't have to ask about role play or anything else.. as it should already be in the ladies profile  

Ladies insight would probably suggest when it's appropriate to ask....but  I usually ask right before the action starts.
 

Your confusion is more grounded in deceptive advertising than a fuzzy definition

Welcome to the game side of the hobby!  To get up to speed read this: http://www.econedlink.org/lessons/projector.php?lid=663&type=student

Here is how it works.  It is called puffery, and that word does not mean what you hope it means . We as clients are expected to be reasonable consumers and know that we are being lied to, to get our business.  Interestingly if you read further down I would equate the hobbyist with a target group that is particularly vulnerable to deceptive advertising and therefore deserving of special protection. I can assure you that my little head has a much harder time telling the difference between GFE and PSE than my big head, and the big head doesn't usually have the final same in these types of decisions! Alas, until the day the hobby becomes legal, no legal remedies will be available.

Until then just know PSE is simply a red flag, that demands you do you homework.  If you see PSE, then you will really need to read the reviews to find out if it she has truth in advertising.

...and whatever it says you have to come here on TER and research the provider. Check her profile, read the juicy details of the reviews. If she offers what you want, has enough reviews for you to feel comfortable she is legit, and fits within your donation parameters see her.

Ultimately the provider defines the term in regard to what it means in one of her sessions. Reading her reviews will tell you what that is.

Every provider will say something different. Its really whatever they want. Its suppose to be gfe girlfriend experience bbbj kissing etc and pse were for the girls that did do anal and are like a porn star. Can pretty much be for up to anything. Lately though its just whatever we want it to be. I wouldnt even go by that anymore.  I would just simply ask whats the do's and dont's for each indivional that they feel comfortable with. Example I consider myself gfe but I still dont do exactly everything that another gfe girl would do. Sooooo yeah!