Mark, I'm ex-Chicago area chilehead, so I can only be of small help. From my experience of Chicago giardinara, all varieties are hot -- at least all the one's I bought. When in doubt have your friend look to see if any are labelled hot or not. I can't remember any particular brands. They were always available at the supermarket because it's real popular with hot dogs and Italian beef. The a good test of any place that claims to be an "authentic" Chicago-style hot dog place (outside of Chicago), is to ask them if they've got any giadinara for your dog. If you get a blank stare, the owner ain't from Chicago. David "Zeb" Cook