How does it not is a better question. Better trebles and mids, more forward mids, clear bass (maybe slightly lighter than X5), and so much more detail across all frequencies that it's irrefutable. I was a non-believer. Now I'm a believer. With the balanced cables even more so.
I am glad you found something you like. I know there is better out there than the X5 with regards to sq. I guess I could google it but I was curious about the storage capabilities? I like having 2x128 with the X5.