i say concert recordings sound better
i like them bothe the same
I do like both BUT seeing a "LIVE" performance is the ultimate!!! Nothing like a all out assault of the sense's at a PINK FLOYD show!!! 
HOWLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
I love thier studio albums, and listening to a concert is great. However, the fact that I wasn't there takes away from it, so studio albums it is
Studio albums are as the music was intended to sound, but live albums do have a certain uniqueness that is quite nice too. I do prefer studio albums, but since I have a reasonable collection of live Pink Floyd performances, I am starting to listen to them more and more, mainly as it is the same songs slightly differently each time, so you get less bored of them/pay more attention.
And moved. :)