Basically to the eye, it looked like a 4 to 1 ratio for brightness, just under 400mW of 660 to just under 100mW of 635 looked almost exactly the same including color. They looked 99% the same. To the camera it was a little different. The 635 does look "orangish" on tape, but in person, to the eye, there was no difference. I'll try to get the clip uploaded in a day or so.