Hi Tim,
I understand to an extent that aspect of the vivip...but I guess it is a matter of personal taste and I find them generally mediocre at best. Some of what I find to be more desireable lilies really aren't all that hard to propagate....Director George T. Moore, for example.
I ran into Rolf this past summer at Kit and Ben Knotts....one of the most genuinely nice people I've run across in the business, and his grower Mike never fails to impress me. Fwiw, I find them both to be as interested in the plants themselves as in the business of selling them. But having said that, we have not crossed business paths, so as you know Rolf really doesn't have much in the way of my hybrids.
I'd have to say what you have is Caliente, based on the pads I have little if any doubts. When primed it is a pale yellow, but it loves heat, so in cool weather and when not sufficiently fed it will go to white. And I'm not saying you haven't properly fed it, just that in the cool nutrient, uptake slows. watch and see what it does next summer. It is half ampla like WBG...and they thrive at high temps.