In looking for a new AC, I ran across two with the same BTUs, same
manufacturer, same energy efficiency, but the difference is that one
removes 25% more humidity per 24 hr than the other. (Basically, that
one is the new model and the other is the discontinued but-still
-available-until-sold-out version of the same AC).

How can an AC be remodeled to remove more humidity?

Sue(tm)
Lead me not into temptation... I can find it myself!