Some of the links on this forum allow SMF, at no cost to you, to earn a small commission when you click through and make a purchase. Let me know if you have any questions about this.
They are most likely a similar thickness so they be done within an hour of each other if using 250F chamber temp. If you wanted to bring them off at just about the same time I'd start the meat loaf first then 30 minutes later add the loins.