Here are the starting lineups for both units—
The 1969 Chiefs have nine Hall of Famers plus coach Hank Stram. They were also full of All-Stars that are not in the Hall for various reasons—Jim Tyrer, Otis Taylor, Jarrell Wilson, Ed Budde, etc.
Certainly, on defense, the 1969 Chiefs have the greater talent and maybe the offensive line as well. On defense, it's likely that only Tyrann Mathieu and a healthy Frank Clark and could play on the 1969 defense (obviously adjusted for the era). Robinson could move to strong safety and Honey badger could play free safety (and slot in nickel). Special teams go to the '69 Chiefs. As fast as Hardman is, McVea and Smith were super-nimble and excellent returners.
But the skill positions seem like the 2019 iteration of the Chiefs are more dynamic. Dawson is a HOFer but Mahomes is just more talented. We'd rate Taylor over Watkins but Tyreek Hill is leaps and bounds better than Pitts and Richardson.
It's an interesting discussion. What do you think? 2019 or 1969 more talented?