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The Cayenne pepper. is a bit milder, rating at 30,000 to 50,000 Scoville units. They're named after the French Guiana city of Cayenne. I'm sure you're familiar with the Cayenne pepper; it's ground and sold as a pretty common spice.
The roaster is moderately hot. Cayenne can be fairly hot but is not really an Italian pepper, Cayenna is a version sold by Italian seed companies like Franci. I grow Cayenne, several versions, but not this one. Roaster is a hybrid tho.