I've had both. First one was Bradley. Used it for 3 years and wore it out. Very easy to use. It was the best cheater smoker I've ever had. Very even heat and smoke flavor.
The masterbuilt that I got was a major upgrade. Automatically feed briquets, set timers on the smoker heat, the feed of the briquets. Seems to use a lot more briquets and I can't seem to get the automatic feed down. But it is a really good smoker too. People from blocks away come to visit and talk BBQ when I fire it up.
Wal-Mart had the best prices on both models when I decided to pull the trigger on the smoker purchase. You really can't go wrong with either model. They are both in the same price range and capabilities. Go with the one with best price.
If you don't have a seat at the table, you're probably on the menu