I was going to say the Luxeon must be brighter. I have not tested the two and I didn't know what to order at first, so I just got a pair of the 6-led setup. I figure I can get two of these for the same price as on Luxeon, and maybe I can spread the light around a bit more?
I should just buy a Luxeon and compare the two for a final decision.
To put things into perspective, here's what luxeons can do compared to a normal 3C maglight. Keep in mind the light is focused and a rocklight will be much more diffused.
http://www.ultimateyota.com/index.php?option=com_smf&Itemid=26&topic=275.0LED technology has improved greatly in the past year that I made my rocklights. They now have some that are 2-3 times as bright as the 1 watts and almost as cheap.
