We camped next to a Tiffin, Allegro a while back. The owner came over to talk because he had previously owned a Thor, Hurricane. He said he was happy with his Hurricane and liked the look and floor plan of our 34J. He made the comment that Thor uses the same furnace, water heater, converter, etc. that was in his Tiffin. The inside finish on the Allegro was noticeably nicer, but for us and our budget, it was the 30k difference in price.