P01_Body01 and P01_Face01 have different rotations, as P01_Face01 is preset for the former's original pose mode, rather than its actual rest pose.  This is corrected for the Alucard(Merged) model.
P01_ExModel01 and P01_ExModel02 are are diffrent rotations for reasons I am unsure of.
P01_ExModel03 does not appear to have rigging in any context.