I'm struggling to properly describe my 'issues', hoping maybe someone can chime in here and help?

This is my OG Desert catboy. I use the 'older' face 2 with facial hair:



This is same character in Benchmark:




Things I've noticed in particular:

1) The red hair in general feels a bit 'washed out' to me? Like its reflecting so much white light that it's making the hair seem a lighter shade? I've seen a few people pointing this issue out with black hair and other dark hair colors, so I don't think its an issue specific to this face/hair. I think the darker skin tone is magnifying the issue on my character.

2) The shape of his eyes (Eyes - 3) has changed, particularly with the eyelid. Comparing them clipped, the old eye has a flatter top and ends closer to the eye. The benchmark eyes have more of a curve and extend out further from the eye for some reason.
OG
Benchmark

3) Something is off with the mouth shape (Mouth - 2, full lipped one) The top lip seems like its not quite as wide as it was in the OG? I also don't know if its a trick of the lighting, but it seems like the default mouth is slightly smiling compared to the OG one?

4) This is the biggest issues I've had. Something is *VERY* wonky with the facial hair lighting. it seems to be reflecting a different amount of light than the hair itself. Due to this, no matter what angle or lighting condition, it looks like a different shade from the rest of the hair. You can especially see it in certain lighting, like the crystal field (see below screenshot of an extreme case)