I love Epipremnum pinnatum! Mine aren't nearly as mature as yours but I also have two very different forms. The one on the left is the more common smooth form with quite thin leaves, the one on the right is a form with bullate, rounder, thicker and almost waxy leaves. Both of these are new leaves of about the same size.
And the full plants; under the growing conditions in my room the one on the right stays much more compact with smaller leaves.
