If you're going by color..
White is the cool new one, because there didn't used to be white motherboards.
It also doesn't show dust as easily, so... less cleaning than black..
buhhhh i don't think i've seen the Premium boards in white yet..
Also, if you're going z170, don't get SUPER premium, get something in the middle, the super premium has stupid stuff NO ONE ever uses.. and almost all the extra features cause latency spikes.. And then there's the irq sharing which most boards may not let you configure, conflicts no, but again, latency, and sometimes interference.