I have zero idea from that web site (typical of X-rite) what's new other than the number 2 on the unit. The 'original' (I have a Rev E) has undergone revisions as you can see, there are differences in earlier units in how it measures white. Not necessarily better or worse but different IF you use multiple units (Rev E and say Rev C) where the measurements will be different. Otherwise I have no idea what this so called new unit is supposed to do the original didn't. IF M1 is it, I'm not sure I'm that impressed.