just noticed the Phil Niekro 1969

cards from ATG and the new 1969 game set are different? I know Strat changed cards on some players, Maris for one, a few years ago but don't understand the 2 cards be[ng different now?

More than 2

I have the original Buzz Capra 1974 advanced card, and it is significantly different from the one in ATG 9.
There are quite a few cards that have different versions...

Wonder why they do that?

The Petrocelli card is way different.