[Joeri]

I am assuming the studio display will support EDR with its 600 nits of peak brightness, so while it may not be hdr, it is not quite sdr either.

For those who don’t know, EDR works like this: when the built-in display of a supported mac is not at full brightness when playing HDR content it will ramp up the brightness to max to make use of the full range of the display for the HDR content while also dimming all non-HDR content to keep it at the same apparent brightness. The effect can be quite dramatic if you’re using the display at a low brightness setting, even on a 500 nit 5K iMac. The hdr content looks much brighter than a white finder window.

https://prolost.com/blog/edr