So this image above that isn't a GM car looks to be just of a HID projector retrofit, with a tuned projector to maximize color at the cut-off, it looks good. Obviously the intensity and width of the hot spot and light output exceeds our stock GM SUV projector headlights. I'm familiar with how much bigger the hot spot can be, more intense the light can be, and wider beam patterns of various HID projectors and headlight retrofit work. Previous vehicles of mine have had HID projector retrofits and the light output is significantly upgraded over stock.
So your friends with Tahoes/Yukons that have upgraded their projectors; Did they actually just upgrade the lenses on the Tahoe/Yukon OEM headlight projector or did they retrofit an entire different aftermarket projector into their headlights? And which parts were used for their upgrades? Are we talking 2015+ models or older ones?