There’s a lot of difference between the livery previews in the game, and it got even more substantial with 21.1 where the previews differ not by time of day or angle, but also by the game engine version they were generated on.
I suggest that all the previews would be regenerated on the new version of the rendering engine with the same angles for every aircraft in an aircraft family. That way, the previews would be more unified and it would be easier to go through them.