I got some from Arrow too: 7500k the highest bin,
The main difference is: when properly dedomed( its not that easy though, at least those samples) The tint didnt shifed much, like only 1000k or something , thus resulting in the best cool white tint( accoarding to the BLFers), like 6000k 1D or so, paired with an the AR glass even i like it.
I tried keeping it at about 7, 7.5 amps tops, to awoid burn-outs
Paied with a good fed dd driver it resulted at arround 2050-2080 lumens( at 7 amps) WHEN DEDOMED, measured with my spectrometer, candelas ( in most knows hosts) are as follows
C8 - 162000
X6 - 108000
L2 - 315000
B158 - 269000
I`ve modded a M3x torch with it too, using a boosted default driver at 7.1amps and it ended at 335k candelas
A very good emitter, especialy if you aint at a good cool white tint after dedoming, simmilar or even an idea better than W2-W3