Here is a comparison gallery of screenshots from both Second Sight Films’ new 2023 4K UHD (left) and Severin Films’ 2022 4K UHD (right) of The Changeling. You can right-click and view image in a new tab to do a comparison. The 4K UHD screenshots do have HDR->SDR conversion and so are not color accurate.
4K vs. 4K
Buy the Second Sight Films version: The Changeling 4K UHD
Buy the Severin Films 4K UHD: