Well, there are some differences between these two bezels. The M2 bezel has additional to the SIS system:
- Pyrex Lense
- comes in HA or black
- has these hex-anti-roll-away edges
- cooling fins
So it is not only a Z32 with sugar on top but a more superior one. On the other hand the Z32 is a little bit slimmer and smaller.
Klaus.