Has to be left
1. Darker / deeper rehaut engraving
2. Seconds hand <--- obvious tell for me
3. Crystal AR/reflection
4. Right one still appears to have thick date disc font
Some more minor but definite tells:
1. The crown is recessed into the case, although it is only barely visible on the comparison picture it is clearly visible from a different angle (casebackview or frontshot)
Plus rep crown looks a bit fatter and the "flutes" are a little thicker and rougher
Gen
Rep
2. The ARF dial stick markers have a small space between them and the railroadtrack printing plus they arent as finely machined as gen. On gen it looks like the stick markers are nearly touching the track.
Gen
Imo all the tells are rather minor and the aef datejust is almost a super rep except for the movement
Nearly all of these tells can be removed by genuine parts and a bit of modding.
I am planning on frankening an ARF datejust with a concentric dial and swiss eta (even though thats a headache its worth it)