I flew VN last year, RGN-HAN-VNE, and definitely did not feel treated as ST Elite+... No access to the crap lounges, no special seat selection, no excess baggage (I did not have excess baggage but asked anyway), etc.

On the other hand I flew SU a couple of times and I was surprised how well it worked. Maybe it'll just take time.

And next month I'll fly SV for the first time and let's see how it goes...