I decided to get the Ultrafine 5K for my Mac Studio setup since I don't feel like spending an extra $300 on a setup I only use a few days a week and want a 5K for a main monitor. This gives me a chance to compare the monitors. The image quality is similar as the Studio Display is using an improved panel of the Ultrafine 5K, which is the same panel from the 5K iMac. The coating on the Studio Display is better since it gives off less reflection. Reflection is a little bit more noticable with the Ultrafine 5K, which affects the image quality somewhat. Otherwise, the sharpness and colors are similar. Comparing to the 2K Dell Ultrasharp, the test is noticeably better on the Ultrafine 5K.
The stand is meh, I can always replace it with a standalone VESA mount, but at least it gives height adjustment, something that costs $400 on the Studio Display, which is egregious. This is the reason I went for the VESA mount option, although it doesn't look elegant. The top bezel is larger on the Ultrafine, but side from that, it's pretty simular although the Studio Display has slightly smaller.
In short, if you don't need to run two monitors off one dock, which the Studio Display does and the Ultrafine 5K can't or use a Mac Studio or get the upcoming Apple Silicon Mac Pro, so far, Ultrafine 5K a viable and a little bit more affordable option, especially if you buy it used (I only recommend the 2nd revision model as from what I read, the first gen model has many issues) and will be better than most of the 27" 4K monitors out there with the scaling issues at 2K. Also, it seems readily available new in most retailers now as there was a shortage of them not that long ago.
But still, the Studio Display is the better 5K option. No 4K monitor can match a 5K one at 27" for use on a Mac and I would never consider a 4K option given all the scaling issues and dealbreakers I read up on. The cost doesn't matter as monitors last for a long time and can be used with different computers.
The stand is meh, I can always replace it with a standalone VESA mount, but at least it gives height adjustment, something that costs $400 on the Studio Display, which is egregious. This is the reason I went for the VESA mount option, although it doesn't look elegant. The top bezel is larger on the Ultrafine, but side from that, it's pretty simular although the Studio Display has slightly smaller.
In short, if you don't need to run two monitors off one dock, which the Studio Display does and the Ultrafine 5K can't or use a Mac Studio or get the upcoming Apple Silicon Mac Pro, so far, Ultrafine 5K a viable and a little bit more affordable option, especially if you buy it used (I only recommend the 2nd revision model as from what I read, the first gen model has many issues) and will be better than most of the 27" 4K monitors out there with the scaling issues at 2K. Also, it seems readily available new in most retailers now as there was a shortage of them not that long ago.
But still, the Studio Display is the better 5K option. No 4K monitor can match a 5K one at 27" for use on a Mac and I would never consider a 4K option given all the scaling issues and dealbreakers I read up on. The cost doesn't matter as monitors last for a long time and can be used with different computers.