The PH-1r is a four stage phaser. The PH-2 is a ten stage on modeI, and a twelve stage phaser on modeII. ModeI is my fave, very subtle and easy to use with chords, ModeII is alot more pronouced and thick. I have tried a PH-1r and if i was going to pick i'd take the PH-1r over the PH-2, but the Ph-2 is a damn good phaser and i always use it.