Integrating over greater distance is averaging travel time. I have mixed feelings about that.
But resolution with extra integration is far better, which enables finer measure of variance. My ES measure should be within 1-2fps.
And that's what I usually want to know.
I can setup the 4' rail also, which I still have with screens mounted. With this, I set the rail center 10' from muzzle and back calculate for MV.
LabRadar holds high resolution with actual displacement points (not time). So it should be more accurate with raw velocities.
Given this, I have no doubt that LabRadar is slightly better, and possibly the best we'll ever have.