I currently have a 5.0 in my tremor and has the 3.5 in my last truck (2018 Police responder with a raptor suspension swap) and in all honestly they are both great engines. The 3.5 would move, and move quickly, going up hills was effortless and barley downshifted, towing was equally as easy. But even with a decent muffler, it still sounded…..off…..not bad, just off. i put 130,000 hard miles on it and my only major issues were a water pump at 100,000, fuel injectors and CAT at 124,000. It was in need of cam phasers and since it would’ve been an out of pocket expense plus the transmission was shifting very weird and I knew it would be another expensive repair I decided to sell it.
my new 2023 with the 5.0 has been great so far (6700 miles) and has even returned about 18.5 mpg with 80% interstate at 75-80 mph in hilly east TN. The 5.0 just sounds good no matter if it’s idle or stepping on it.
Either engine is a solid choice if taken care of and maintenance done at or before scheduled intervals.