Halo - half cap/half sidewall, rockered, flexy and not symmetrical, really small turning radius
Wall - Symmetrical, fully cambered, stiff, pretty standard turning radius
So if you like buttering around, pressing, and don't carve bigger turns and rarely go outside of the park the halo
If on the other hand you enjoy carving, spend lots of time switch, want tons of pop from the camber, and something that will always remain stable, but cannot butter easily pick the wall
it ain't Saturday, but it don't matter to me... GOT NO JOB!