Well a “masseur” and a “masseur that goes all the way” are also different fruits.
Thats where the acronym YMMV comes in.
And to answer your question, a masseur who goes all the way can provide experience that some (or many) escorts don’t intend (or aren’t expected) to give, which is in the area of intense foreplay, the exploration of erogenous zones, the “build up” of intensity, and that sense of “not knowing what’s yet to come.” The entire sensorial experience is different.