This would be a mesmerizing dream match of sorts between two, beautiful technicians of the sport. Johnson was, in my opinion, the more versatile and the faster of the pair, so I lean towards him. There would be very little for Zora to sink his teeth into in terms of openings for his right counterpunch.
This would be a good boxing match and test of wits. While Zora folley didn’t have the best chin I don’t think Johnson would have the power at heavy to do too much damage. And while Zora was a natural heavy, Johnson beat a few good fighters at that weight. I think this could potentially go to the cards and end in a close decision. Not totally sold on who id pick
Johnson won decisions over Machen, Charles and Valdes, and I see no reason why he wouldn't do the same against Folley unless Zora got lucky, and I don't think he would be aggressive enough against Harold to get lucky.