CubeExplorer is definitely easier.
Of course, but you can't have incomplete cubies, and fun stuff like that.
Come to think of it, I could write a beginners' tutorial for a-cube. Only problem is, I will finish it in a couple years time, and it will already be redundant. At least, that's how it turned out for the last tutorial I said I would make...
Lol what?
CE and ACube can both support incomplete cubes.
The only 'problem' at all with acube is lack of a good GUI. Acube3 has a half-decent GUI out (which'll *seriously* be ready for 4 soon ) anyway. Mostly functional, anyway.
acube4 has a lot of advantages over CE. It supports wide turns, more metrics, rotations, harsher restrictions, and the like.
If anyone has any problems, just email me and I'll clear up any issues.