I just got my XP-G2 Peaks from Oveready, a Logan and an Eiger. The results are a bit surprising...
Let's start with the Eiger. The beam is cool, about the same as the XP-G (caracteristics & tint). You see that it's a tad brighter, so no surprise here yet. EDIT : A second test in the dark actually revealed that my XP-G2 is not as bright as my XP-G head! Weird, but I tested more than once...
Turning on the Logan reveals a bright beam with a more or less round hotspot. I only own a 219 Logan to compare, that one has no round hotspot at all, it's a sort of a small point with flares around, the XP-G2 is a nearly perfect round circle. Are those emitter so different or is my 219 perhaps not exactly centered in the optic, no way to see... As for the tint, the big surprise comes : While cooler than the 219 for sure, it's much warmer than the one from the Eiger, you'd say 2 completely different emitters, like the Logan was 5000K and the Eiger 6500K. I really love the beam and tint from my Logan XP-G2, for my gusto 5000K is about perfect, not cool and not warm - just nice.
Now I wonder if other owners (or Dan) can confirm what I see? If Oveready chose the emitters that way, it would make sense to me, the cooler one for the Eiger to maximize performance on an AAA (10440), the nicer one on the Logan as it's brighter per nature. The only thing that puzzles me a bit is the differences in beam caracteristics from the Nichia to the XP-G2, but hey, they are Peaks...