How is a porn career different in US vs Europe?

Is porn different in American than in Europe? I notice in America the girls doing porn can do 1-10 then retire you never hear from them again. Of coures there are exceptions, however, it seems like 1/3 or more fall in this category. Meanwhile, in Europe it seems like a actress will appear in all sorts of movies and be part of "circuit" where she shoots with multiple companies becomes part of the porn community.


I've seen this in reality tv as well, in America they'll find someone new to do the show, while in Europe "reality tv" is a career and they'll have the same characters in multiple shows ready to be booked.