This is a seed grown N. ventricosa X singalana I also grow. I'm not sure about the origin of this plant, but I bought it from the same nursery that sold me the N. 'Bill Bailey'.
The second plant is darker, more plum colored than the named clone, and MUCH tubbier, which I really like. BB is elegant and has a nice profile/waistline, but the seed grown plant is already loaded with pitchers that give the visual impression of a lot of pitchers taking up far more space. It has more "impact" visually, I think. You like?