5K across and 2K (2160 down) vs. ASD 5K across and 2880 pixels down. It's not wider 4K but it
is wider 5K. The sacrifice is in some pixels in the vertical... and however we want to feel about spreading 5K out to a wider screen enclosure instead of compressing them into thinner work space.
It's also 120Hz instead of 60Hz. So if one can handle the loss of 720 pixels in the vertical, they can enjoy that doubled Hz, so often slung around to rationalize other Apple tech.
And then there's the abundant built-in hub/KVM vs. only a couple of jacks of one type...
...which I find tremendously useful myself.
It doesn't have a built-in cam but Continuity Camera allows us to use far superior camera quality to fully wash that. It doesn't have good speakers but anyone wanting great speakers should have bought great third party ones which easily outperform tiny little speakers baked into a thin case of
any monitor (or TV). And of course, it doesn't have an Apple logo but one could stick on an Apple sticker and likely fool anyone if that's the most important thing to us.
To each his own of course. I certainly consider it an excellent option for Mac people wanting more screen for the same money. Or one could buy TWO of these new ASUS monitors for
TWO 5K monitors side-by-side as another alternative for about the
same money as ASD too.