That's a standard model, so definitely not 1/6.
Bulgari doesn't offer much limited models, and when they do it's haute horlogerie or bling bling.
My guess would be GEN, as the crystal on this particular model has a strange shape and altough the picture is pretty bad, the AR seems really strong.
I doubt the REP has such strong AR. And I also doubt, that many REP owners of this particular model would get AR done on it.
And the datewheel looks good too.
But that's just my opinion.