Tim aged way better sure, but the Spurs had really good roleplayers and a fantastic coach not unlike the old Bulls, plus fking Admiral Robinson. (Strangely enough, the Twin Towers could not overcome Shaq)People are forgetting just how good Tim Duncan really was in his prime. Those old Spurs teams weren't all that loaded compared to other NBA champions. This is also ignoring the fact that Duncan was still one of the best players on the 2014 championship team at age 38 while KG was a shell of his former self by that point. Duncan was a better player in his prime and he also had much better longevity. Duncan/Garnett isn't a serious debate.
KG had to hard-carry the Wolves for a long time after Googs left before KG could hit his stride.