I've seen this on DDRFreak and ITGFreak as well, so let's give this a shot. Rank easy-hard songs by their level. Most people do 10's, but I haven't played enough to judge so. This is by passing, but do scoring if you want. Everything is in order.
OFFICIAL:
Low 11s: Clockwork Genesis, Charlene, Utopia, Xuxa, Robotix, Vertex^2
Mid 11s: Destiny, Infection, Mythology, July (although I can't pass it for some reason)
High 11s: The Beginning, Hardcore Symphony, Monolith, Pandemonium
Low 12s: Delirium, Go 60 Go, Vertex, Tell, !
Mid 12s: Energizer, Euphoria (Suprisingly easy to pass, just a bitch to score on), Determinator
High 12s: HOTN, Bloodrush
Low 13: Summer -Speedy Mix-
Mid 13: Pandemonium
High 13: Vertex^2
Rebirth/ITG3:
Low 11 (Skipping a chunk of them): Always In My Heart, Feels Just Like That Night, Nightmoves, Les Vacances Du Compositeur, Supremacy, Disconnected -Sanxion7 Remix-, Space Space Shooter, Last Man Standing
Mid 11: Frozen Fire, Hands Up, Etude For A Dragon, Asian Crosscounter
High 11: Hyper Hyper (11 cut), That is Fair, Rock Steady, Sonic Vision, Space War III
Low 12: Hyper Hyper (12 cut), July 8-bit, Disconnected -Delight Mix-, Me And My Lover, Over The Rave
Mid 12: Dead Souls, Sail Away, Metallik Heart, Gargoyle, Dream To Nightmare
High 12: Pink Fuzzy Bunnies, Get Down, We Met Dat Night
Low 13: Indulgence (more like a 12)
Mid 13: Epileptic Crisis
High 13: Vertex^3, ReaF, Disconnected Hardkore
OFFICIAL:
Low 11s: Clockwork Genesis, Charlene, Utopia, Xuxa, Robotix, Vertex^2
Mid 11s: Destiny, Infection, Mythology, July (although I can't pass it for some reason)
High 11s: The Beginning, Hardcore Symphony, Monolith, Pandemonium
Low 12s: Delirium, Go 60 Go, Vertex, Tell, !
Mid 12s: Energizer, Euphoria (Suprisingly easy to pass, just a bitch to score on), Determinator
High 12s: HOTN, Bloodrush
Low 13: Summer -Speedy Mix-
Mid 13: Pandemonium
High 13: Vertex^2
Rebirth/ITG3:
Low 11 (Skipping a chunk of them): Always In My Heart, Feels Just Like That Night, Nightmoves, Les Vacances Du Compositeur, Supremacy, Disconnected -Sanxion7 Remix-, Space Space Shooter, Last Man Standing
Mid 11: Frozen Fire, Hands Up, Etude For A Dragon, Asian Crosscounter
High 11: Hyper Hyper (11 cut), That is Fair, Rock Steady, Sonic Vision, Space War III
Low 12: Hyper Hyper (12 cut), July 8-bit, Disconnected -Delight Mix-, Me And My Lover, Over The Rave
Mid 12: Dead Souls, Sail Away, Metallik Heart, Gargoyle, Dream To Nightmare
High 12: Pink Fuzzy Bunnies, Get Down, We Met Dat Night
Low 13: Indulgence (more like a 12)
Mid 13: Epileptic Crisis
High 13: Vertex^3, ReaF, Disconnected Hardkore