No the brightness will remain the same, the light concentration will obviously be more focused in the projector including having the proper cutoff.
The Tahoe/Yukon reflectors in this case play almost no role because there are no side facing leds in these bulbs. So it'll be interesting to see how focused the beam will be without the assistance of projector optics. It's actually very difficult to control light pattern with stand alone leds. The fact that Nokya has attempted it makes me hope that they have achieved it without too much bleed/glare on the top end.
---------- Post added at 10:16 PM ---------- Previous post was at 10:06 PM ----------
The only thing is that you seem to be getting some funky colors in that output ... I think I see some green and some purple. Also although they are indeed powerful the light distribution isn't as even as the halogens. This is to be expected cause obviously those projectors are designed to distribute light from a halogen bulb which illuminates in all directions. But the main thing in your case is if you see a real life improvement in the output.
I think for the reason I stated earlier, the Tahoe/Yukon output will be completely different and will allow all the light through unimpeded ... so probably more light but nowhere near as defined a cutoff.