when i swapped mine over i found that the internals of the masters are the same from jdm to adm ones (these were both aisin). all the bias is taken care of from the bias valve so no difference in the master themselves. the boosters don't seem much different either.
but the adm master can only bolt to the adm booster and vice versa cause the studs are offset on one booster and horizontal on the other, can't remember which is which.