Spawn Comet (RB, , , , LB, , , , , RB) vs Low Gravity (, , LB, RB, LB, , , LB,)

Compare Spawn Comet (RB, , , , LB, , , , , RB) and Low Gravity (, , LB, RB, LB, , , LB,) — stats, differences, and which is better for your build.