'03 6CTA 480ce vs '06 QSC 540, which preferred

First, love the forum and thanks to everyone who participates. Such great reads and info.

Looking at two boats, one with a 2003 480 550 hours and the other with a 2006 QSC with about 1,000 hrs.

Both seem to have been maintained evenly and are clean. I know about the 480’s 23 gph rule at 2,200 RPM and the turbo and aftercooler don’t show the extreme discoloration you can see in some pics on this site.

Don’t know much about the QSC’s though (except owner replaced one turbo) and trying to get a feel for how much better one may be over the other or if they are about the same in terms of reliability/dependability.

All the best and thanks in advance.

J