Bellower vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Bellower	Ogryn Tribes	Void	Support	Rare	Speed 15% Place: Crypts
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Bellower	60	6	16515	1013	914	99	15	50	30	15
Gravechill Killer	60	6	13545 -2970	1233 +220	892 -22	96 -3	15	50	30	10 -5

Bellower	Frazzle Formula: 2.6*ATK Attacks all enemies. Has a 20% chance of placing a [Block Active Skills] debuff for 1 turn. Block Cooldown Skills	Mighty Bellow Formula: 4.2*ATK Attacks all enemies. Has a 50% chance of placing a 15% [Decrease SPD] debuff for 2 turns. Cooldown: 4 Decrease SPD 15%	Bowl Over Formula: 3.6*ATK Attacks all enemies. Has a 75% chance of placing a 25% [Decrease ATK] debuff for 2 turns. Has a 75% chance of placing a 30% [Decrease DEF] debuff for 2 turns. Cooldown: 5 Decrease ATK 25% Decrease DEF 30%
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%