Cool, thanks for the guesses and info. And yeah, I should know better than to think that any of these are a specific species considering I grow Nepenthes too and understand the way hybrids work there...
I already repotted the yellow intergenic (I've nicknamed it 'Bumblebee') a while ago, and it looks like the purple one is in peat moss so I'll repot it into bark and sphagnum once it's done flowering.