If you do everything else right, and get a fine enough crush to keep your efficiency, but not so fine that a stuck sparge doesn't prevent you using your prefered temperature control (if you rely on that in a HERMS, RIMS or other recirculation setup), or make you miss your pre-boil gravity or volume, then there are unlikely to be any significant differences. In this case, a simple infusion mash was used, so there were no issues with recirculation or temperature control. The coarse crush here was still fine enough to get good efficiency, so again, no difference should be expected.
Astringency etc. that is sometimes associated with too fine a crush can be prevented by sparge water pH control. In this case, no-sparge was used, so that doesn't apply at all. If sparging had been done with low-mineral water, I'd expect some differences to show up.
There seem to be several Exbeeriments done now that vary a single factor with everything else being near ideal. They mostly show no effect. IMO, it's when multiple things are off that problems and differences show up, and some simple things like crush and sparge water pH should be controlled in case of mistakes elsewhere.
