I have read the same thing. Green is in the middle of the visible spectrum of light which is supposed to make it easy for the eyes to detect.
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For me and where I live (sagebrush Martian landscape between Sierra Nevadas and the Rockies), green is far easier to see/pick up quicker than red. However, at night, I find green to be overpowering as compared to red.
I chose green. I don't really need or use illumination in daylight, however it's nice for looking into shadow or dark areas and for me the green stands out better than red against a dark background. Those pics above represent the green hue very well in the accupower, not sure about red. Good luck with your choice.
It sure looks like it, I was only speaking about the hue/tint of the green color. To my eyes anyway.