My wife doesn’t know anything about watches. When I showed her both watches side by side about 3 feet away she pointed the sub dials right away.
The stock rep is a great watch don’t get me wrong but the Gen dial and GEN DW is a different story.
In my option the only tell when the watch is on the wrist is the sub dials. You can see it from a distance.
Side by side there are a couple of more differences that in my honest opinion cannot be seen on the wrist.
The first difference is the color of the dial. The rep is darker in most lighting. In indoor bright light or outdoor sunlight the rep has a slight purple tone shade to it.
The second difference is the “Audemars Piguet” logo. The Gen one is kind of floating above the dial like it is barely touching it which makes it POP. The rep is sunked in more.
The third difference is the 3D look of the squares on the dial. Also some of the squares are not in the right position especially near the sub dials.
The fourth difference. In the rep, the DW is not very clear. When I first got the rep, for a minute I thought the DW is misaligned but it wasn’t.
In some lighting I feel like I can’t see the full number from the top part of the number.
The GEN DW font size is a bit bigger compared to the rep DW.
The DW square hole on the GEN dial is slightly bigger.
So this makes the GEN DW very clear compared to the rep.
This is what I can see with my naked eyes and only when both watches are side by side and I have to concentrate to find these differences.
I really enjoyed the stock rep blue dial watch but never had the guts to wear it in front of my friends with GEN APs. After I got the Franken, the sub dials are a big tell in my opinion.
Today I can wear my Franken with full confidence.
Again this is a great rep, enjoy it !!
Thanks to
@legend 
for sourcing the GEN Dial and GEN DW in NEW condition (Very hard to find them NEW) and for building this great Franken.