Ahh I see, the Zotac VRM design looks similar to their 1080 (from what I can glean on the Official page), just more phases. If it matters, the MOSFETs on that edition had a weird 2 phase low side + 1 phase high side (i.e. 3 MOSFETs per VRM phase) setup. However the mosfets themselves are pretty cheapo individually (i.e. low efficiency) which means they need some seriously beefy cooling to get their optimal output. The 2 by 1 setup means your ultimate current capability is limited by the spike durability of the lone high side FET so thats the one that is going to blow if something goes wrong. As for how to get 16 + 2 phases, I have no idea how they're achieving that. 6 x 3? maybe? but triplers really weird but chances are, unless they got permission to use a different voltage reegulator, the actual regulation should be on par with the Aorus.
Also, I re-listened to the PCB breakdown again, I was wrong. The ASUS has a 5 x 2 +2 setup not a 6 x 1 +2. However, it is also very likely ASUS still has the best voltage regulation because their MOSFETs are godly, high efficiency and run at the same 300khz that all the others so far are running at, though MSI come a close second.