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#11
M.2 drives can be either SATA or PCI-E. Some of the PCI-E ones support NVME. PCI-E drives are the fast ones.
I'm not sure whether any of the SATA M.2 drives are faster than similar drives in the 2.5" format. (That's an oversimplification; there are 2.5" drives that use other interfaces, but I doubt that they are intended for use in a desktop PC.)
It is also possible to get PCI-E drives that fit into PCI-E slots. They can be expensive.
M.2 drives have one potential drawback: poor cooling. There are heatsinks available, and some MBs have heatsinks built in. If the drive gets too warm, it'll throttle.
bobkn - all good info - I have fans blowing over 2 of the M.2s on my ASRock machine - makes a big difference - all my M.2s are the fast ones.
Gigabyte boards offer good performance for the price and they provide tech support for the product life. However, they only post BIOS and driver updates for about 3 years after the product release. Other brands offering longer software support may be an advantage if they exist.