I think the remastered 1080p Blu-Ray in the UHD package is considered very accurate color-wise to the theatrical version, and it’s a better transfer on top of that, too. The UHD disc itself, though, is less color-accurate.
I think it’s the otherway round. The 1080p was derrived from the HDR master and in some scenes the brightness is a bit too high, The colors are otherwise identical.