Its my understanding the ecotec family of motors was a whole re-design from the vortec motors. Aluminum block, direct injection etc etc. but I don’t know. They’re all V8s that get garbage mileage, and I’m ok w/ that! Sorry for the derail OP...I don’t agree that the 6.2 is a totally different design than the 6.0. My L96 uses the same “ls3” style square port heads, only difference is displacement and the compression ratio is probably different.
IMO, and I could be wrong, is that the 6.0 is de-tuned for longevity and fuel economy compared to the 6.2.
My 6.0 does seem to use some oil at 130k.