whats shown there isn't a hob as I suspect you know as you put it quotes. I call them faceted gear cutters.
That's an elegant description. In the linked thread it was discussed that the method gets less accurate as the number of teeth decreases. Even some of the gears with large numbers of teeth looked to have a poor tooth form. Although one needs to bear in mind that the gears were physically small.
Conventional hobbing still produces a series of facets, just many more of them. For ordinary gears the hobbed finish is fine. But for precision gears the gears were often shaved and ground after hobbing. Two big advantages of hobbing are that only one cutter is needed and no time consuming and error prone indexing is needed. A disadvantage is that hobbing can create undercutting of the tooth even when it isn't needed for clearance of the mating gear.
Standard involute cutters are only correct for the lowest number of teeth they're listed to cut. However an involute cutter designed and made for a specific number of teeth may well be more accurate than a hobbed gear. Depending of course on how accurately the involute curve is formed.
From a practical viewpoint I doubt many of us would be able to measure the differences discussed above. In the commercial world there are many tweaks and twiddles applied to the tooth form to promote smooth running of high speed and highly loaded gears.
Andrew