Difference in gen3 vs gen4 5’ bed dimensions

Hey all I’m reaching out because I’m curious if anybody has the numbers on the difference in measurements between the gen3 and gen4 5 foot bed. I have my tonneau that I took off my gen3 but I didn’t consider that the dimensions might’ve changed on the bed. It’s a bit of a faff to install it, so figured I would see what others have learned before I waste the effort. I should’ve taken some measurements from the gen3, Primary concern is distance between the bed rails. Thanks!