COOK barbecue sauces and honey in saucepan on medium heat until heated through. (Do not exceed 160ºF.) Cool. Refrigerate until ready to use.
PLACE briskets, fat-sides up, in parchment-lined full-sheet pans (or in lined half-sheet pans for trial recipe). Rub 1/4 cup (60 mL) seasoning into each brisket; brush with 1 cup (250 mL) of the sauce mixture.
BAKE in 225ºF standard oven 16 to 18 hours or until meat is done (160ºF) and very tender, brushing every 2 hours with about 1/4 cup (50 mL) of the remaining sauce mixture. Cut across the grain into thin into slices to serve.