If your goal is to make reddish plants, bluer light could be possibly better. I haven't found Drosera specific literature, but generally anthocyanin production is promoted by blue (and UV) light in many plants. It's their stress response to protect from light damage.
With regard to photosynthesis, I haven't seen much difference between them (i.e. photosynthetic photon flux density, PPFD, seems to be pretty similar between different K from my measurements).
In general, the difference in K of fluorescent bulbs is coming from different hight of the major peaks. There are some bulb, which emit quite a different spectra, but most of them have the same peaks (3 or so), just the relative hight is modified.