Front sight on Classic is green tritium and a white outline, .140" wide. The Operator front is the same but .125" wide.
The rear sights are identical except the Classic has white outlines around the tritium; the Operator has black outlines (not seen) around the tritium dots.
Same difference in regards to the AmeriGlo Pro series and the Pro Operator series.
The Classic and Pro Series both use a .140" wide front (item GL-112)
The Operator and Pro Operator both use a .125" wide front (item GL-112T)
The Pro and Pro Operator rear sight notch is .180" wide
Classic and Operator rear sight notch is .150" wide
The Pro and Pro Operator rear is longer, extending back toward the end of the slide
The Pro and Pro Operator rear face is undercut a few degrees, eliminating glare
The Classic and Operator rear sight is better suited for catching on a belt to rack slide (one hand)
All models discussed in this Answer are installed using the GTool2 (or a factory sight tool)
If you shoot well with the standard post & notch sights, we suggest you stick to those. If for some reason you are no longer shooting effectively with that style, you may see improvement switching to the ghost ring version. Also, we have several police team using the ghost ring sight.
No. Contact us by email and we may be able to refer you to a business set up to export.