The big thing with burners is their design, not so much the physical burner, but the housing. Blichmann designed the burner for max heat output when using brew pots (such that if you put the burner on the ground without leg extensions you could scorch the surface), as compared to banjo that as already stated has the pot sit higher up not keeping as much heat under the pot. I know a guy in my club that got a 600k btu wok burner but when he fabed his heat shield lost all the BTUs by blocking the burners air flow. When you do chose take a look at how your pot will sit and the expand ability too so you can buy a burner once and have it last your brewin career.