I feel like what I see most is red (more ripe, older, whatever you want to say) jalepeno's including seeds, Im not exactly positive though. I think this because there not exactly scortching hot, but do have a nip on your tongue. Hotter i've always assumed to be cayenne crushed. Again just taking a swing/guess at it. I've only noticed the thickness being different. Already noted I have been to a few places where the seeds even looked different along w/ the color as well. When there dried and crushed up it can be awfully hard to tell for me.