Spawn Duster (, , RB, RB, RB, , , , , , LB, LB) vs Explosive Melee Attacks (, , , , RB, , , ,)

Compare Spawn Duster (, , RB, RB, RB, , , , , , LB, LB) and Explosive Melee Attacks (, , , , RB, , , ,) — stats, differences, and which is better for your build.