Funny because Mac Baren for years has claimed that Royal Twist and Roll Cake are identical, that Roll Cake was just a re-branding.
I bought a tin of Royal Twist at a pipe show a few years ago, it was quite old, probably mid 80s as the importer was "Martin Bros" (so after Fireside and before Swisher). The tobacco was like smoking black pepper, it was unbelievably spicy. And that's after smoking 5 bowls a day for 3 days straight at the show, my mouth was already dead, and this stuff just blew me apart, it was some firey, nasty stuff. Even the D'oblone doesn't come close. D'obolone is a little ugly, but it's ugly in a deep kentucky kinda way. The Royal Twist was terrifying. Like a Va/Per on steroids.