I am going to fly Elite out of JFK recently, and I have Star Gold from another airline. I used to have Silver with BR but not anymore. And according to the online seat selection portal, it seems that there is only one Elite seat left.

I know BR habitually blocks more seats from online portal so the real load might be fewer than what it shows online. But just wondering should I register under my BR green card (entry level) account or *G account to get a higher chance of upgrade should there be any oversold?