the X2 has: True Bypass and Analog-Dry-Through. 5 minutes of looping time. Undo / Redo function. Unlimited overdubs. Audiophile approved 24-bit uncompressed high quality audio Dedicated Stop/Clear footswitch Loop FX (Reverse and ½ speed) Import/Export loops from PC/Mac (via USB on rear panel) Backing Track – perfect for solo practice and live performance Stereo In/Out I'm a huge fan of tc, and I'm completely addicted to my original DITTO and my Flashback X4's so obviously I need this too!