The best Luxeon bins - X0 and W0 are generally the most preferred tint bins it would seem - are 'whiter' than the Snow 29 LEDs. But a lot of times, it comes down to which two colors you are most interested in differentiating between. For folks that do outdoor work, a white LED that leans towards yellow is possibly the best choice of rendition of browns and yellows.
If compared to the very best X0 or W0 Lux IIIs, the Snows do look slightly bluish but I consider the Snows to be pretty much excellent as far as 5mm LEDs go.
One of my personal tests is in part of the house, we have fairly dark green furniture on a fairly dark blue carpet (looks better than it sounds). The test is, in a darkened room, can I readily tell the difference between the blue carpet and the green couch. With the Snows, it's VERY easy to see the difference. With the River Rock and Nuwai 0.5W lights, it's next to impossible.