I like the look of both, depending on wood choices.
Got to agree with the above,
I've got three Blackwidow PLX longbows, all with no red glass, and I really like the look of them and the woods they are (Curly Bubinga, Bocote, & Tiger Myrtle)
But a mate has a PCH Greenleaf with the red, and man, thing that looks really sharp.
To me, both red and no red have their place. They say "Beauty is in the eye of the beholder".
So whatever spins your wheels really, there is certainly no wrong answer
Nothing wrong with how they shoot either, all that I've shot shoot extremely well too.
Best
Lex