I prefer the aluminum as well. The aluminum handles seem to be a bit better finished than the G-10, in the sense that the aluminum is slightly thinner, and the corners are more rounded. The first thing I'd do with a G-10 Axis is round the corners off -- which takes all of a couple minutes, so don't let that stop you if you like G-10 better.
My aluminum axis does not have smooth aluminum scales, the aluminum feels very very chalky and provides a good grip even when wet.
In addition, for some reason, the aluminum axis is lighter than the g-10 axis.
The downside to aluminum, of course, is that the anodized coating can chip off. I always carry my knife clipped to my waistband, so I don't need to worry about that too much. But it'll get scratched badly if carried in a pocket with change & keys.
Joe