I don't know but it sure looks like standard 'Gold Flame'. I don't know where they get their names from. I have some hybrids that look like S. hahnii Gold Hahnii but it is a complex hybrid with variegation takes on the same look but leaves are much thicker and harder.

Here's pictures of my S. trifasciata Gold Flame;

Robert, message me.

'La Rubia' means Blond and it does have some leaves all Blond on one side while other side is just variegated. Also Known As (AKA) Golden Flame. New names always come with 'Rare' and with a big price tag.