The DD lite rail is only 2-2.5oz lighter than the larue. So after you put a 1oz (or more) QD mount on it is probably unnoticeable. Correct?
Which do you prefer and why?? Would be a plus if you have experience with both… (FWIW I am not worried about ease of install as I am not installing it)
I have both and they are both quality made rails with differences.
I find that the DD is slightly thicker, and i also notice the Larue rails themselves to not have sharp edges to them, as if all of the edges were broken down by sanding them before finish. The DD rails are rough to the touch. Both of these will serve you well.
I don’t think the big difference between the Larue and DD Lite rails is in the weight.
The big difference is in the profile. The DD Lite has more of an oval shape as the bottom rail is farther from the barrel. Also, the DD Lite connects all the way to the upper and creates a continious upper rial.
That being said, look at the DD RIS-II. It has the same type of profile as the Larue rail. If you are going to run a light on a offset or at 12 o-clock, I like the shorter bottom rails for this.
The DD QD mount is actually 0.5 ounces according to my scale. I prefer the DD for the slightly lower weight and continuous top rail. URX III might be an interesting option if one could be found.