I think I can answer that question from experience.
The Journey DL was last produced in 2003, the new Vectra/Horizon took it's place with mods and a new chassis. Unless your coach actually has the DL letters in the Name, you have a Journey.
Now from our personal experience, the DL did not stand for Deluxe. We don't know what it meant, other then adding an extra $10,000 to the price. It certainly wasn't a set up from our 2001 Adventurer 35U other then the diesel engine and Freightliner chassis, which in it's self cost another $40,000 more.
If everything is working and you don't have any problems, you have a good coach and should be a happy camper.