I thought red LED was faster, green was energy efficient, and blue was running cooler.
Not sure if white or black has Ork effects on system performance.
Black is more likely to match most things but white looks nice if you have other white things like your mouse, keyboard, or monitors.
There is literally no difference aside from personal preference. Get whatever case you think looks nice
I've had stationary PCs sonce the 90's and never cared about led or glass, so I have of course been through all design trends during the past 25 years. I can simply sum it up as:
What color is your desk/monitors? All black would be super sleek, all white would be super clean