Pull the one that reaches your desired temperature first. Then watch the remaining one and pull when it's at temp. Each is its own animal. Double heavy duty foil, beach towel and cooler the one that's done first. It'll stay hot to the touch for a couple hours.
Once it's pulled from the cooker, the meat temp won't rise as much for meat slow cooked in a smoker as compared to meat cooked at higher oven temperatures. You may want to smoke the PB to a little higher temperature. Enjoy.