Just at first glance, the font is off, on both the bezel (too bold) and the dial (incorrect spacing and font thickness). Also, the lume in the markers and hands on a new Rolex is white (almost indistinguishable), where as on the rep it looks obvious.
And for some reason, the cut on the bracelet does not seem as smooth as on the gen.
I've noticed that when you grab a gen Rolex, everything seems to fit perfectly. The silhouette exudes harmony (if that makes any sense). Might be the picture, but this rep does not inspire confidence without mods. And the aforementioned issues are found via photos. In person, we might find a lot more issues, and I'm 100% that with side-by-side compatison, it would fail (fit and finish, spacings, dimensions, etc.).