Brightness is the same just one has an extra bulb so you can flash lo/hi but of course quartz will never be as bright (quartz ~700 lumens, HIDs 3200 lumens) I've only sold hi/lo kits and have the same installed in my VX and my GF's VX. If your state does not require hi and lo for inspection, save the $$ and you can always put the stock lamps back in @ inspection day.