N is fluorite Paul, and has 114mm OTA diameter. ED, EDX, EDXIII has ED glass of course (x2) and has 125mm OTA diameter.
I think ALL the N's also had blue titling on the dewshield, whereas the ED's have red. The N came with fixed dewshield or later, the FSQ106N (kai) which introduced the retractable one.
The N is the most desireable, as the star images are tighter and less halo/flare due to the fluorite elements not scattering the light as much.
As to Hans statement, well, Peter is right - libel is a harsh mistress. Leave him to be devoured by the blatant lies and fraudulent activity he expounds in great abundance. It WILL eventually catch up to him.
"The least initial deviation from the truth is multiplied later a thousandfold." ~Aristotle
Thanks again everyone, especially the NUMEROUS people that emailed and messaged me with rather alarming details regarding this dealer. Shocking indeed.