I like both, a league obviously is more engaging but takes more efforts, survivors are cool as well but I think they should be tailor-suited to the discography of a band, and at the very least giving more slots to songs from favorite albums, rather than the usual "top 2 songs to the finals" approach. To make an example with Iron Maiden, all the classic albums of the '80s have basically 8 songs and the critically panned Virtual XI has 8 songs, there's no way that Virtual XI gives to the finals The Clansman and... what, Futureal? and Seventh Son of a Seventh Son gives only two out of The Evil that Men Do, The Clairvoyant, Infinite Dreams and the title track. Or with Metallica if you will, two songs from Master of Puppets and two from St. Anger which would lose to all the other 6 songs of Master anyway?