Re: N. Smilesii
a photo of the underside of the lid of the latest pitchers for both plants, and a couple more leaf tips for "smilesii" would be good.
On the "smilesii" I can see two acuminate tips (end of the leaf narrowing abruptly and not gradually, as opposite to "acute"). The species of this group that have such feature and linear leaves are N. suratensis, andamana and bokorensis. Honestly this doesn't look like bokorensis or andamana. The hair around the base of the leaf is typical of all 3 species (not 100% sure about bokorensis, that has very variable indumentum). The bulk under the lid is definately diagnostic of N. suratensis. The reddish new leaves are also typical of suratensis. When I say this keeep in mind that there is some variability, which means: bulk under the lid means suratensis, but not all suratensis have bulk under lid; reddish new leaves mean suratensis, but not all suratensis have reddish new leaves; hair around base of leaf means suratensis, but... etc.
Larger and thicker or thinner leaves, as you noticed that, unfortunately are not characters that can be used for an ID, especially for plants in cultivation.
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