There is no need to be disingenuous. This monitor (currently sold out on Dell’s site by the way) retails for $2,179.99. One can’t compare new and used-heavily-discounted pricing.I gave up waiting for the right Apple monitor last year. Landed on an open-box Dell U4025QW ultra-wide for $1100.
It's 5k2k, 120hz, multiple inputs... and yeah, surprisingly Dell even shipped decent macOS support for the first time I've ever seen with a little menubar utility. Has full audio/brightness controls from the keyboard.
Beyond that, it is TB4 (instead of TB5). It has no webcam. And it “only” goes to 450 nits of brightness for SDR, and “only” 600 for HDR; the XDR is 1000 and 2000. If none of this matters to you, that is perfectly fine. But these aren’t equivalent.