Spindle the same?
Mostly good information, except of course for the usual absolute garbage about the taller knuckles causing ball joint angle issues. Either Ehrenburger or one of his kool-aid drinkers must have supplied the info.
Actual data shows the geometry changes from using the taller knuckles are both minor and possibly helpful, depending on the rest of the suspension set up. You can see the geometry data in this article.
Swapping Disc-Brake Spindles - Mopar Muscle Magazine