Color and Spectrum of Cree X-Lamps?

[three.six.drive]

Was wondering what everyone thought generally of the whiteness of cree's Xlamp production recently. I was thinking of ordering a kit or two to mod my Nuwai Q3, BD Gemini, others.
It's mostly the WF, WG, WH, WC, WD, WJ, WP, and WN bins I have my eye on.
Besides the color, how's the output in terms of spectral completeness?
Hopefully not a redundant post. This sort of topic is hard to find by searching. Tried.