While searching for a cheap, yet powerful motherboard for my budget gamming pc, I came across two motherboards that seem to be almost the same exact thing, these two mobos being the Asus H110M-A/M.2 Micro ATX LGA1151 Motherboard and the Asus H110M-E/M.2 Micro ATX LGA1151 Motherboard. The only difference I see is that one says "A/M.2" and the other says "E/M.2". I was just curious as to what this means, and what motherboard would be a better choice, they are both pretty much the same price.