There is a big difference between these girls. It is like sky and the ground. I mean you will never change a Lamborghini for and old cart. An escort is specialised not only physically, but also spiritually. Besides having physical closeness with this girl, you can speak about a lot of topics as with a very good friend, also you can share with your life problems and she will sustain you for good money. Unlike escorts, you will never have more than sex with a prostitute. Personally I am the loyal client of escorts in London and I will never change them for prostitutes.