This isn't really a review; more like some initial observations in prelude to a review after I wear them more.
To add to the confusion, the different styles fit differently. The Crosslite 2.0 (yes, I adore them too) fits bigger than the Quantum. Regardless, I bumped up to an 11 (44.5) in both. Back to the Quantum in a minute. I ran the Epiphany 50k on Sunday in the Crosslite 2.0 and they were perfect. No issues and no foot soreness whatsoever. The only thing that I'm mildly concerned about is how they drain water and that I can't attach gaiters to them - both minor things, since I'm fairly certain they'll drain water well enough.