Good question, my opinion is that the Granites feel better in the hand, the focussing is more precise and it snaps into focus quicker. They are slightly smaller and lighter and ergonomically fit a bit better, the minimum focus distance is about 3m so they are easy to carry around for terrestrial use. Optically I wouldn't say there's much between any of my binos and my eyes are probably the weakest link and I'm lucky because optically they are all good.
My Miyauchi and Fujinons show the least amount of CA closely followed by the Granites, Lunt and then the Pentax (still negligible) - I'd definitely recommend the Pentax ones as they are superb value for money and you won't regret buying them - I got mine from FLO for about £150