I prefer Prospector when doing raw material research, Knowde seems to be helpful when I’ve already decided what material I want to use and I am now in the tracking down samples/documentation phase of my research
Agree with @Perry on the starter formulations. A lot of good bases to start with and I feel they really give you a good idea of what each ingredient is doing as they are usually so minimalist
Have also noticed that more and more suppliers seems to be on neither website and instead I must create a login for their specific website (which of course I can never remember what email/password I used so I end up just finding another ingredient to work with)