Bike porn

Quite possibly. In which case why have different flange diameters at all.

Although I suspect the disc side is flater. You could flaten the side with the screw on free wheel to match. But you'd lose more in bracing angle, then you would gain in even tension (total guess).

Its probably marketed as providing a stiffer build with regards to braking. But I'm not sure I buy it.

i have that wheelset and they are the stiffest wheels i have owned, - stiffer than my old hope biguns and that were massive! they aren't however very porn worthy light yes but the bearings are tiny so don't last as long as they should, pretty major design flaw imho - will go back to king for my next mtb wheelset