all the tracks that were played on GNR were original songs made for the game
"all" the tracks (all 4 of them) on mojave radio are actual licensed songs by real artists, thus bethesda had to pay to use them, prob had to pay quite a bit, hence there being a lot less variety
imo they should have stuck with who ever did all the stuff for FO3, i ended up loving most of those goofy songs
