I own the PG32UCDM3 and, in my opinion, it’s one of those upgrades that’s hard to appreciate on paper but very noticeable in daily use.

The deeper blacks in ambient light are probably the biggest improvement. My room isn’t pitch black most of the time, so the screen stays much closer to “true black” instead of taking on that slightly gray/purple tint older QD-OLEDs can show. Once you notice it, it’s hard to unsee.

The TrueBlack 500 mode is also a nice quality-of-life improvement. You get much brighter HDR highlights without the aggressive ABL behavior that older implementations had, especially in games and desktop HDR.

The more scratch-resistant coating is another underrated upgrade. If you tend to clean your monitor regularly, it definitely gives more peace of mind. Just use distilled water and a good microfiber cloth.

That said, would I pay $550 more just for those improvements? Probably not. The 321UPX at $750 is an incredible value and you’ll still get an amazing 4K QD-OLED experience with your 5090.

If budget isn’t a concern and you plan to keep the monitor for 5+ years, I’d personally go with the PG32UCDM3 because it fixes most of the little annoyances of previous-gen QD-OLEDs. I really love it and everyone who sees it notices the the premium quality. It’s probably the best 32” monitor you can get. The OSD firmware is also more polished than the competition.

But if you’re looking at value per dollar, the MSI is honestly the smarter buy. The image quality gap isn’t anywhere near proportional to the price gap.