The CREEs have improved significantly, for the color temperature across the part, showing a minor issue just on the edges of the part. LumiLEDs still has them beat for this.
CREE has them beat for efficiency, and should soon release their 70 lm/W parts.
One of the big issues with reflectors, is they mainly focus the edges of the beam, and the center part of the beam does not even hit the reflector. A deeper reflector is important with the CREE, to catch more of the premium part of all LEDs, more of the center of the beam, which is also the highest output area. A bit of surface texture on the reflector will also help mitigate the issues for those trying to use a reflector, along with the deeper reflector.
As HarryN mentioned, most of the available CREE white are bin WD, and it is hard to get any of the other bins. It seems CREE has a much better control on their process, holding the parts much closer to the target. Imagine if 90% of the LumiLEDs parts were WO bin!!! (lol, fat chance)
Anyhow, here is another chart, notice the tighter grouping on the CREE part- where the Luxeons have a much wider spread in colors, and the "sub-binning" as compared to the Luxeon (note-Unfortunately, these full color charts look different on different monitors):