Has anyone compared store bought v. heirloom v. making your own with chili?

I've been making my own yogurt by just using a few tablespoons of store-bought yogurt as a starter. I'm happy with the results. (Prefer pasteurized vs ultra pasteurized for flavor.) Has anyone tried the heirloom culture? Is there a difference in taste? What about making your own starter from scratch with chili peppers? How does that compare?