There are 2 white tints that I know of, B0 and C0. B0 is considered the "correct" tint but has a noticably blue center spot. C0 is considered "more phosphor that spec" and is therefore a little more yellow/green, but is also better for overdriving (Recall that all non RGB white LED are basically a blue-ish LED with green-yellow phosphor to shift the light color)
Sooooo the tint you want is either B0 if you like blueish / hate hints of catutine green or C0 if you like more accurate color rendition / want to overdrive.
Also, there are 2 bins floating around, T bin and U bin. U bin are brighter but harder to get and more expensive (about a buck each rather than 75 cents.)