Compare the 50 playlists from 4 recommender systems yourself.
Download our iTunes library.xml file, listing the 12,000 songs used to create the playlists 16Mb xml file.

Genre breakdown for 12,000 song library
GenreCount
rock7698
alternative5501
pop4066
classic rock3457
indie rock2043
hard rock2010
punk1873
folk1642
metal1642
experimental1552
psychedelic1442
blues1401
electronica1175
grunge1035
jazz944
emo943
indie pop912
britpop911
soundtrack873
new wave844
soul839
ambient833
funk827
heavy metal826
soft rock802
rap724
post-punk675
hip hop642
alternative metal612
folk-rock539