I tend to hold The Octopus and Amplifier on the same level, the main difference that makes me feel like the debut has a slight edge, is because of the concept/epic idea behind The Octopus. It kinda works for good and bad, but the album is a 2 hour concept album. Sometimes that's awesome, sometimes 2 hours can be long to sit through, even if the songs are great. It kinda depends on the mood. While it is a really strong double album, and probably the biggest achievement by the band, I think the debut is probably their best overall. It has no weak moments at all, where I would say The Octopus might have one or two duds, but it's more forgivable since it's a double album.