I'll pipe up here with my opinions:
1. Defining GFE vs PSE by specific services is ludicrous. The key word being experience. How the experience makes you feel is the original essence of each acronym.
Each of these was originally meant to differentiate the experience from than that of a typical mechanical paid sex worker servicing of basic sexual need to get off with a woman instead of your hand.
2. To me, GFE suggests an experience where you feel like you are with your typical girlfriend. Nice, warm feeling, comfortable sexual encounter with a friend or lover. The Sp approaches and treats the session as if she is truly attracted to you and wants to be with you even if she is just acting.
Typically, with a girlfriend you'd have some sort of oral, maybe 69, traditional sex positions etc. If either of you feel the need, then a condom for oral is optional and should not be argued over. Kissing*, to whatever degree is more is part of normal foreplay and/or while having sex with a bf/gf Afterwards you want to feel close, lie together and bask in the shared experience.
3. PSE evokes a feeling that you are a stud fucking a porn star, or she is fucking and sucking you like a porn star. Lots of noisy cocksucking gagging, "yeah, fuck THAT pussy" kind of thing. Trying all different type of unusual positions. Facials, slapping, choking and other mutually agreed to kinks, "special requests" etc with or without extra charges should be agreed to and not assumed. Afterwards you might tend to feel, "Hell ya!, now that was some crazy shit right there!"
Specific services provided should not be assumed, nor expected as part of the above.
4. *Kissing is considered as quite an emotionally intimate act by many. Men and women alike. It was not that long ago that kissing sex workers was one of their hard limits.
Kissing of any type should not be assumed with either GFE or PSE unless specified or agreed to by the sp in advance. And with some of you who have no idea how bad your breath smells, the sp has every right to change her mind at any point. As she does with anything. Kissing while seemingly innocuous, does involve fluid exchange between mucous membranes and has the highest RISK and likelihood of transmiitting an infection of any sort. With the exception of ORAL Type 1 Herpes and meningitis, the CONSEQUENCES of these infections are less dire than say bbfs, bbbj. DATY and rimming.
Risk is different than CONSEQUENCES!
Risk of HIV transmission from an HIV infected woman to a man via vaginal sex is quite low. However, the CONSEQUENCES are life changing, if not life threatening.
Risk of transmission of chlamydia, gonorreha, syphillis, e-coli UTI's is HIGH with bare penetrative sex but perhaps the consequences are relatively lower as the infection can usually be resolved by antibiotics. Current STI testing, a positive result will often identify the specific strain of the infection and the lab will provide a list of antibiotics that are more or less effective in treating THAT strain of the pathogen.
5. A hand job, blow job and vaginal intercourse is considered the basics of any standard rate of a P4P encounter. Unless otherwise noted, as blow and go, hand release only etc.
6. Assume that a session involving penetration with a professional sex worker will be provided with whatever mutual protection a condom provides. Dicks and fingers. Asssume blow jobs and vaginal and anal will be covered.
7. DATY, rimming and fingering is a higher risk but maybe low(er) consequence of infection for the woman. The rimmer risks e-coli infection. The ass getting eaten risks suffering painful herpes 1 infection in the ass. Unprotected oral sex involving bbbj, DATY and rimming has high risk of transmitting several infections of varying CONSEQUENCES.
This is all to say that in MY OPINION as a long time. hobbyist, that GFE vs PSE shouldn't be categorized by ACTS.
Rather, GFE and PSE defines the character of the EXPERIENCE.