Less, a 1:1 mix of peat/perlite or either some LFSM works well for them. Sundews usually like it a good bit wetter than flytraps.
They're actually easier to keep than flytraps, or so it seems to me. They're also easier to propagate and make more plants via leaf-cuttings. Just remember, if you get some seeds sprinkle them on top of a thin layer of some finely chopped up LFSM or sifted peat moss (no perlite) that's spread over the top of the growing medium. The seeds are tiny-tiny-tiny and you don't want them falling into a crack or crevice where they'll probably die. On the top, uncovered. Make sure the growing medium is good and moist. Once the seeds are planted *lightly* mist them. Use distilled water. After you have them planted and misted loosely cover them or place the pots in a plastic bag (vented with a few holes in it) to maintain a high humidity level. The covering or "bagging" isn't absolutely necessary but it seems to help me. Put the pot some place in the 70-85 degree range and have some patience.
Some seeds require stratification (a period of moist cool time)....capes don't require it, though.