UK: In my experience Emirates! Has way better food, entertainment systems, interior of the plane is awesome well trained staff but kind of overrated /-: I mean isn’t it?
Turkish Airlines? Hmmm well, I have never used them but I hear they have much better services now than those who experienced the airliner say 5-10 years ago.
However, if both carriers can take me to the same destination, then I’m gonna pick the cheapest of ‘em :P