For the mopar years we usually talk about, the Autolite who became prestolite are dual point cast iron distributors. This allowed the dwell to be increased since one point fired the coil, and the second one closed before the firing point set closed to start recharging the coil. So, by increasing dwell, you had better coil saturation to support higher rpm ignition.

The plate also rotated on ball bearings so less timing spark scatter.

Late 60s there are some look alike presotilite cast distributors, but they are single point and not specifically prestolite made. So, I assume chrysler did this for some reason.
So the High performance cars got dual point.