They're usually pretty close to each other in my experience. Having said that, on larger cuts of meat, I usually take the temperature in several spots and "average" them.
The Battle Wagon used on the BBQ Pitmasters Show "Chicken Wang, Chicken Wang, Chicken Wang" NOW lives in O-Town, Floriddy
Stump's Smoker "Baby" (Pretty in Pink)
Stump's Smoker "Tailgater"
Stump's Smoker "Monster" (01/08/2013)
Weber Smokey Joe (Homer Simpson Edition Mini BGE