The name.
Sometimes, I feel like that's all there is to it. The circuitry is different, but they do sound similar on some settings. I supposed a flanger is a bit smoother than a phaser, though.
Quote by franz.d.
What to change the band name? No way!! We have a kick-ass logo of a washing machine eating guitars and everything!!

Quote by elvenkindje
Lol, when I'm bored I'm gonna try that with regular dice! If I'm famous I'll thank you for it