Unfortunately, the Samsung, Asus, or Dell alternative displays only have a non-competitive matt display and no glossy display. That's why the Apple Studio Display has this outstanding picture!
That... and its stability regarding color/brightness/contrast being solid over time. I set it up once when I received mine a couple years ago. And there's been zero drift since. When processing photos in Lightroom, what I see on the screen is what comes out of my printer. My previous non-Apple display required periodic calibration tweaking, resulting in wasted prints and ink.