Perforator vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Perforator	Dwarves	Force	Attack	Rare	-
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Perforator	60	6	14205	1277	804	86	15	57	45	0
Gravechill Killer	60	6	13545 -660	1233 -44	892 +88	96 +10	15	50 -7	30 -15	10 +10

Perforator	Vermin Slayer Formula: 3.6*ATK Attacks 1 enemy. Has a 30% chance of placing a 5% [Poison] debuff for 1 turn. Poison 5%	Hardened Tips Formula: 4.1*ATK Attacks 1 enemy. Will ignore 50% of the target's DEF. Grants an Extra Turn if this attack kills an enemy. Cooldown: 4	Scare Off [P] Has a 35% chance of placing a [Fear] debuff on the target for 1 turn when this Champion inflicts a critical hit. Cooldown: 2 Fear
Gravechill Killer	Freezing Toxin Formula: 3.9*ATK Attacks 1 enemy. Has a 40% chance of placing a 5% [Poison] debuff for 1 turn. Poison 5%	Blood Chill Formula: 6.8*ATK Attacks 1 enemy. Has a 75% chance of placing a 30% [Decrease DEF] debuff for 2 turns. Has a 75% chance of placing a 60% [Decrease DEF] debuff instead if the target is under a [Poison] debuff. Cooldown: 4 Decrease DEF 60% Decrease DEF 30%	Icy Veins Formula: 2.65*ATK Attacks 1 enemy 2 times.Each hit places a 2.5% [Poison] debuff for 2 turns. Places a 5% [Poison] debuff instead if the target is under a [Poison Sensitivity] debuff. Cooldown: 5 Poison 2.5% Poison 5%