Mikrokopter X8 prop rotation direction

My MK quad is flying well, and now I also want to put a MK FC on my X8.

The X8 with a HFPro controller has the top props all spinning CW and the bottoms are all spinning CCW. I see that the different MK mixers for X8 have alternating props spinning CW and CCW on each level, top and bottom. Of course, the top/bottom pair don't spin the same way.

So, which is better? All top spin one way and all bottom spin the other, or alternate the MK way? Yeah, I know, the MK way is the *only* way, right?

Pros/Cons of each?
 

Top