What I can say for sure as graphics technician is that red pigment was most problematic throughout whole human history. I would guess that there are same problems with rubber manufacturing. With lesser certainty I can say that with some model's of rubber we do get red sheets of rubbers noticeably softer than black, for example Tibhar evolution MX-P rubbers. This is not only my personal opinion but from much better players than me as well.. I would guess not many people notice this because they don't play with hard enough rubbers and most do prefer softer rubber on one side, usually backhand. Second example where red sheet is much softer and so much that it actually curls up (reverse dome) and it is a problem to reglue it would be Xiom Vega Pro.
My experiences are with 2.0 and max thickness rubbers, mostly max, I dont know if it applies to thinner sponge rubbers.
Edit: all other things being equal, there is less of a contrast between the ball and red rubber sheet so it's harder to see contact on services.