Hmm, ji-hi.net has been updated with Lunar's encode for comparison. I'm comparing gg's and Lunar's encodes. gg's seems to have a bit more zoom to it, and warmer (perhaps more unnatural) colours. I don't much like Lunar's font, either for the OP or the episode proper but that doesn't really matter, as we all know. Lunar's filesize is, as I mentioned earlier, much bigger than other releases (no idea why).
gg's TL/edit is, as one might expect, the most fluid (so far), though I believe they really did just do this on a whim and so shouldn't be counted on.
By the way, Desire's 720p encode is alright, but their 810p is definitely an upscale, with a corresponding decrease in detail. Their translation is also markedly different from the other groups who are compared at ji-hi.
Conclusion: I'll still wait for Frostii.