I've used the WG tint that DX sell, but I'm buying some from Cutter and they only have the WC tint in at the moment and I was wondering what the colour difference would really be.
A "whiter white"....slightly more toward the blue end of the spectrum than what you've used. Some people prefer (or are offended by) one or the other. I can see the slight difference if both are shined on a white wall side by side, but not so much out on the trail.
WC/XRE work fine for me. I have several WC tint XRE light heads and I prefer the color over WH. I don't see any bluish tint in my lights, but that will vary from batch to batch. I haven't tried the WG. I'm planning to with my current XPE build.