Here's our friend Kelvin Miyahira with an interesting comparison of Zach and Dustin.
Huggy's comments from below:
Just because Kelvin voices over "stalling, stalling, stalling" on Zack Johnson's video doesn't make it so. There are many high speed videos of his swing that show that Zack is not a pivot staller, quite the opposite in fact. The DTL view is much better to see this than a face on. Here's just one of many examples readily available:
With as strong of a grip as he employs and as well synched he is on the downswing, if Zack stalled, he'd hit it left of left.
DJ is much bigger than Zack, much more athletic, probably a lot more fast twitch muscle fiber as he is a good all round athlete in other speed/jumping sports. Those things account much more for differences in distance than their technique, IMO.
Hit em Straight