ZF colors are just one thing but wrong bezel engravings (shape and positions) and minor problem with Tudor shield logo is worse than V6F. In this case I can live with small mistake on caseback vs glaring "one look is enough to say it is a rep" problems on front view of ZF's version:
Tudor shield - upper two "windows" are not rectangular on gen and V6F.... on ZF they are...
Since both ZF & V6f versions were photographed with the same source of light (and the same direction- look at the shadow of big triangle at 12) - the ZF's edge of sapphire is way too much reflective when comparing to both gen & V6f - looks like angle the edge was cut is different.