from what I can think of is a way better floody beam than the Nichia, and a better colour rendition with Nichia rather than the MCE.
but there certainly is more to the MCE than just beam, and flood certainly.
did you order the MCE 4500?.
if you still wish to change that , get in touch with him before he builds it.
i have the MCE 4500 ready made!.
...not really after more colour, rather a better floody beam and an LED which is highly rated indeed.
from Jason's site;
About the Cree MCE:
The MCE features 4 LED dies clustered onto one chip. This makes a very powerful light, but because of the large surface area, is best suited to "flood" applications. Generally speaking, the larger the emitter area, the "floodier" the beam.
The MCE is an older technology that the XML, but for a small hand-held light I think it's a superior LED. The XML is brighter, but it just can't beat the MCE for beam quaility and color accuracy. It also costs 3X as much as the XML and is one reason flashlight manufacurers are eagerly embracing the newer XML. I'd be happy to put that extra $10 in my pocket, but it just doesn't make a better flashlight.
http://darksucks.com/ledselection.html