Omage here you can see some pictures I took before selling my cartel build (the one with the more aged insert).
The major differences are the wider insert, 28mm dial diameter instead of 26mm and the shape of the crown.
But I think the more notable difference is that the HR dial installed in the cartel build is not a true gilt but simply gold painted.
It's a matter of money, the Vietnam build of course is better but the price is the double of a cartel build.
If you are a fanatic of details like me you should consider to buy a viet one (maybe with a vintage low beat movement), if you are looking for a nice vintage watch the cartel is good. Like jkf Daytona vs viet Daytona.