Lumin T2 vs X1 - How big is the sound difference?

So I have a Lumin T2 DAC/Streamer and I wondered if I could get more out of my system by upgrading in the DAC/Streamer area. One that I have my sets set on is the X1. For those that have heard both, how big a difference in sound quality is there? 

I connect my Lumin directly to my amp (Line Magnetic 805ia and the soon coming Diablo 300). 

Thanks!