I don't know. The lower pitcher you sent me looked more like
a khasiana type pitcher than an ampullaria. I thought hookeriana
was supposed to have a symmetric pitcher, similar to ampullaria,
with the spotted coloration and fringes of rafflesiana.
God, I'm no taxonomist, but I'll bet Nepenthes drive them crazy
since they seldom flower, and when they do flower the flowers all
look the same. A REAL taxonomist would use photomicrographs of
pollen to determine species, wouldn't they? :-)