Mofo says above that the xo1 accepts DM. How if it has a fixed spider? Or is there an aluminium xo1 and also a carbon xo1?
Essentially, XX1, X0 and X01 are the same crank arms and are carbon only.
X9 and X1 are alloy.
All have a removable spider that can be replaced with a direct mount ring.
X0 spider is either 2 or 3 ring, XX1 and X01 spider is a single ring.
The XX1 and X01 spiders have a differenct bcd.
XX1 bcd is 76mm
X01 BCD is 94mm
A XX1 specific ring will not fit on an X01 spider and visa versa.
You can get around this by trowing the spider in the bin, and using a standard SRAM or other Sram specific direct mount ring.
Direct mount rings will work on XX1, X01, X0, X9 and some X1 (1400) cranks arms.
The other SRAM cranks do not have a removable spider(XX, X7, X5, X1 (1000) etc). They will use a ring, similar to your raceface nw. You just need to confirm the BCD.