The Turned Left Wrist of Standard Action has enabled the Elbow to 'lead' deeper into Release Interval (Pitch Basic Stroke) than the Vertical Left Wrist of Single Wrist Action (Punch Basic Stroke).
Since the Pitch Stroke is conducive to greater Trigger Delay, we observe Swingers having more of a "true" Snap Release than Hitters.
And everything else being equal, that means greater Clubhead Speed.
Another point for the Swinger on my Swinger/Hitter Scorecard.