The Alter Ego Delay is a special version of the Flashback Delay which has two custom factory sounds (the Deluxe Memory Man and Binson Echorec) that are not available in the Flashback Delay. Instead of these two settings, the Flashback Delay has the Lo-Fi and Dynamic Delay settings that are not available on the Alter Ego. Apart from this (and the color differences), the two pedals are identical hardware-wise, and the Alter Ego works with all Flashback Delay TonePrints.