[Tom]

Based on your question, both engines making identical peak numbers, yes the 454 will be stronger as it will make more power at less then peak numbers. Peak numbers only matter at full rpm. The 5.3/4l60 in my 02 suburban drives awesome and barely revs over 2400rpm accelerating on side streets. We have a 2015 yukon with the 6.2L/6sp auto and it drives terrible comapared to the suburban. Rev's to at least 3k most gears, has to downshift constantly, just sucks. That subs's 5.3L is like 300hp, the denali is like 400hp and weighs less with more gears.