Is there a difference in Wife’s? Yes. But I think you are putting a UDS in the same category as a cooker/grill made from 55G barrels.
The most successful UDS’s are simple, with no doors. Air control is key! (for low and slow burns)
Are you looking to build a unit?
Does this help? If not, some body else can chip in, or I shall try again.
Welcome, oh by the way!
Yoder YS1500; Yoder YS640; and a Weber kettle! Purple Thermapen
Senior Judge, SCBA
Carolina Pit Master