Theres been a few threads about this over the years.....
I cant remember my cat number - but I think its the same for both releases anyway.......its those cheeky italian scallies and thier lack of sample clearing! lol.
The first one is some well known singer or other which they probably nicked the vocal off, and for general release when it got recognised a bit more as a track they got Karen somebody or other to re-sing it.
Therefore look out for the ones which dont feature Karen if you like the orig better - or visa versa.
See ya
Sirius.