Driller is a shot which is colored purple, and is shaped like a drill. Leaves no trail.
When it hits the ground, it "drills" inside it with 4 explodes, each smaller and each is more inside the ground, making the target stuck in a hole.
Damage: 14 Damage each hit.
Slammer is a shot which is colored white, and leaves a purple trail.
When it hits the ground, it deals 20 damage, not making a hole. Then it bounces upwards, and slams to the ground when it reaches its peak, dealing 46 damage.