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All dual probe therms are designed to perform the same functions. The only question is how accurate is any given model. I'm positive that the Weber brand is made in the same factory as other brands but I know nothing of its quality because I never researched it. I swear by their kettle charcoal grills, though.
I bought the Maverick ET-733. The two most popular therms on SMF appear to be the 733 and the 732.