Great question.
We did a few video comparisons between our CH/PVS-14 monoculars and the Spyron
https://www.instagram.com/p/CTxdfLFpRlM/
https://www.instagram.com/p/CQaR0JDHOQC/
First off, all of the units have the same Photonis Echo White Phosphor tubes, they all have the following range specs:
SNR: 25-30
Resolution: 67-72lp/mm
EBI: 0.1 to 2.5
The differences really come from the housing (CH/PVS-14 vs Spyron) and the lenses.
CH/PVS-14 Standard - entry-level monocular in a classic and trusted PVS-14 housing body. Waterproof, dust proof, reliable.
CH/PVS-14 Plus - currently backordered until next week and unavailable on the site - improves upon the Standard via a lower-profile front lens with anti-reflective coatings for off-axis flare suppression (these are analogous to reducing camera lens flares)
CH/PVS-14 LE - both front and rear lenses are replaced with European mil-spec Act in Black lenses, anti-reflective coatings on both. Enhanced rectilinear performance and contrast.
CH/PVS-14 Pro - Front and rear US Milspec Carson lenses. The absolute ultimate in optical performance in the areas of distortion, contrast, light transmission.
Spyron - Ruggedized, skeletonized lightweight housing and lenses from Act in Black, enhanced electronics (auto-off when flipped up, auto-on when flipped down), multi-coated optics for flare suppression, excellent rectilinear performance, slightly wider FOV (for enhanced situational awareness) at the expense of a tighter eyebox (not advisable if you plan on using full-face protection eg: paintball masks or gas masks. Low profile eyepro is good to go)
