I'd be interested in how one would (test it).
Within (linked thread), it seems a valid point about a side-by-side test.
Is there any way to either side-by-side a scenario across identical versions of Iray? Or for that part force (somehow?) current ver in-DS or code to newer/newest? Or force other platforms to older?
Changelog states "current" in DS is 2022.0.1 (-http://docs.daz3d.com/doku.php/public/software/dazstudio/4/change_log_4_22_0_16)
With other sources saying upwards of 2022.1.7 (-https://www.daz3d.com/forums/discussion/656976/daz-4-22-can-t-find-info-on-iray-version)
...and seemingly backed up by the DAZ NVIDIA thread page (-https://www.daz3d.com/forums/discussion/600281)
EDIT: Correction - Latest in the latest public beta (4.22.1.110) is 2023.1.4. (According to DAZ NVIDIA thread.)