Thinking about ordering one of these for my XD45 that is my HD gun. Seem to have very good reviews and i love the small compact design of them. My question is which is a better laser to have, red or green, and why is it that the green is more expensive ?? I myself like the red dot, but if the green is better for XX reason than i will go for that one. I did a quick search and didnt find anything on here about it. Thanks.