I really don't know, but I do know the dollars would make one think so. I've only really looked a little into osram, cree, luxeon, bridgelux, Samsung, etc... I think the gains any of them have over each other is negligible.
But really, and I think it was maybe mentioned in this thread, it's entirely worth just about whatever cost you want to drop on lights, or any equipment for that matter. A lot of y'all consuming ounces upon ounces a month... compared to retail, you're making out like a bandit any way about it.