To expand on his question a bit further, is a mini-PCIE slot also an M2?...always?
There's a lot of new mITX boards with a wireless adapter card on them (which I don't need), can this little card be replaced with a SSD (as long as it's vertical/capable of a full height drive).
I've hunted this down for hours last night, and can't seem to tease that info out of Gigabytes motherboard specs for their newest gamer series boards. They appear to be the same, and some motherboards even call them mPCIE/M2, but some only call them one or the other...clear as mud seems to be a growing talent.
BTW, I know super talent makes a half-height drive, but I'm more apt to trust a name like Samsung or Crucial..the Egg doesn't carry their half-heights.