The 6.2 picks up a lot of speed with a BlackBear tune, I’ve been impressed by it. I’m not a big 5.3 guy, it’s a revver. It never really did well at competing with the 5.4 Triton, lacked the torque of the 5.4L. So comparing to the Ecoboost is even more stark. I’m sure the 5.3 is a good motor all in all.....it still holds it’s own compared to smaller vehicles by the times.