I was recently reading there is some small gains to dual channel vs quad channel. Plus if one stick dies in a quad channel kit you need a whole new set, but if a dual channel one dies you can just get another single stick to replace it. I am no expert just shopping for the same RAM and read that on a linus or Toms forum.
* Buying 2 kits of dual channel would be better than buying 1 kit of quad channel was my take away.