According to Jebb and Cheek in Flora Malesiana Vol. 15 2001. The illustrations of N. vieillardii in their work you quote from 1991 are of N. lamii.
Aarons plant looks like all the N. vieillardii I have seen from several different sources. Although there are some differences in the width of the leaves towards the base. they tend to have the broader blunt leaf tips. I have not looked specifically to see if the difference is more to do with climbing vs rosette leaves. With some white hairs on the leaf surface. Usually a reddish color but that could be more environmental. Pitchers are usually reddish with broad wings and those very fine almost hair like filaments along the edge.
I dunno what you have Tre.. but it is not N. vieillardii in my opinion.