DDJ-SZ Sound Quality

Hello. Just wondering if anybody had any experience with the SZ's sound quality VS the 900NXS?  I'm debating between the 2 and if there's a huge difference in quality, that will steer me to that unit.  The advertising says it's the same sound quality between the 2, but I'm not sure if they packed the same parts into the SZ  since it is cheaper in price. I'm coming up from an 800 and I'm hoping to get at least the same sound if not better.  Not sure if the average listener will notice, but every once in awhile someone tells me how good my sound is (with the 800).  Thanks!