My assumption: that the guy is even nailing ZIP sheathing is doing so because some engineer determined it was an improvement over previous construction techniques.
(But maybe it is just cheaper.)
(But maybe it is just cheaper.)
Better? No idea. Although there might be less to screw up unless someone cost-saves by not installing the spec tape (it really is necessary).
ZIP will let water vapor out, so your walls won't rot out. So if you want your house to last OSB is actually worse (though OSB houses have lasted a long time with no problems so this is again on the margins).