I just got the Gen and VSF in Blue recently.
In my opinion, they are really very close.
I had difficulty differentiating gen from rep while I had them side by side. Got them mixed up a few times.
I wasn't able to weigh them but they feel similar.
To me, the VSF is great ootb without mods.
Seems like the gen white gold bezel and the rep bezel shines the same. Not sure if the rep will maintain the same shine down the road.
If you're on a waiting list for a gen, I feel that the VSF might be good for satisfying your Datejust itch.
These are just some of my personal observations.
- Subtle differences like the crystal and date wheel.
- The crystal height on the rep is also higher.
- Rehaut engraving is more crisp on gen.
- Winding is smoother on gen.
I have attached some side by side pictures for us to view.
*The Gen is on the left, Rep on the right.
I got the Gen on oyster bracelet. But the VSF Jubilee fits the gen just fine.