^ there a lot. I've handled several pairs of each one. off the top of my head...so don't hold me to it.
1. faux noir. these are the older kinds. not selvedge, but they are raw. made in macau. they look greyish, or black with white weft. hence the "faux"
2. noir. these are the newer kinds. red selvedge, but not raw. they look really black. can be identified as made in japan. BUT I am 100% sure there are some that are Made in Macau. And I can confirm that the MiJ and the MiM ones have different measurements for the same tag size (to make it even more confusing lol).