I plan to run the Zeitgeist campaign using pathfinder 1e, but have bundles and ACT 1, 2, 3 in drivethrurpg. I don't know what the difference is, should I just buy the BUNDLE?
I believe there are some updates here and there in the act 1, 2, and 3 compilations that the individual adventures do not have, but they are relatively minor (stats for ships, maybe a few fixes).