You implied it, by using words like "off the bat" and "real source site". As much as i love wzor (and his friends) they are not really official For insider previews the tlu esd link is the original one till msft releases preview iso's once in a while. Wzor also collects tlu links or still encrypted esd's to save/backup them in his cloud. Wzor also will not publish iso's made of esd's himself, mostly adguard will create and publish an aio iso and doesn't state it's official.
You just beat me to it That's a perfect example of people misunderstanding info, the mentioning of wzor is for the used source esd files to create iso's. The iso's can (i'm willing to believe lyraull doesn't ad something "extra" to his iso's) be modified in ways you won't like ps, That line is by lyraull because he knows MDL doesn't allow unofficial iso's to be published
My second insider PC with 14393 enUS is downloading 14915 My first Insider PC with 14901 esES is waiting...