IMHO, some pipe tobacco is one of the best scents in the world. I don’t know that they do differently between that and other tobaccos (I love cigars, hate cigarettes) but it is a great smell.
The difference is that pipe tobacco is soaked in various scents and flavors. I used to smoke a roll your own cigarette called A100 that was soaked in vanilla. People didn’t care that I smoked around them because it smelled like a pipe.