Nice article even if i've already known the topic..
The only thing i wish to add to the story is that the fact two masts are done in the same factory (many of the 100% carbon masts are done here in Italy by Reglass or Triana) DOESN'T mean the two masts are the same!
It could be (and it is) that two masts of different brands produced in the same place are just the same but it could be not also.
So always check..
Another thing is that NP (for instance..) changes the mast curve almost each year so a NP 06 mast could not be good for a NP 08 sail and vice versa..
Isn't this "nice"?