I have the little chief, big chief and the Bradly. For smoking the chief work just as good as the Bradly in the warmer weather but when smoking below 10 degrees the Bradly is much better. Also the Bradly you can load up the wood pucks and walk away where the chiefs you need to hang around and change out pots. I use to have to wait around on a weekend morning for 5 hours while smoking before heading out. The Bradly you can smoke anytime. It is more about judging when you think it will be done as you do not want to smoke all night and over do it. For cooler weather though you can wrap the sides of the big chief with card board which helps a lot. Make sure you leave the top open for moisture to escape.
Cheers, Rob