Why are these 'better' emitters? A little brighter? A little more run time? Who cares? They're freaking green!!!
Quark X is a lot brighter. and theyve been on sale since fall/winter 2011 (-10%, -20%, -30%, holiday sales, and now stock clearance sales because of new logo and packaging). at full price i wouldnt buy the green Quark which i got. 30% off plus cpf discount, so i wont complain about the very green light.
i could have returned the light (like you're going to do) but at that sales price i have kept the green light.
Youre right, i (or we) only care about "runtimes and little brighter" on the paper when we place the order and need to compare with Fenix. Once we got the light, those numbers, lumens and runtimes are all forgotten.
Once we got the light, the paper (specs sheet) becomes unimportant and everything else which was NOT mentioned in the spec sheet becomes important: built quality, thin threads, greenish tint, the bores, beam profile and corona artifacts, manufacturing tolerances in the machining, ..