Vasal of the Seal vs Wythir the Crowned

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Vasal of the Seal	Demonspawn	Force	HP	Legendary	HP 33% Place: All battles
Wythir the Crowned	Demonspawn	Force	Support	Legendary	Resist 50 Place: All battles

Stats comparison

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Vasal of the Seal	60	6	21315	870	1288	98	15	50	40	20
Wythir the Crowned	60	6	24120 +2805	793 -77	1178 -110	108 +10	15	50	40	0 -20

Skills comparison

Vasal of the Seal	Abyssal Seal Formula: 0.25*HP Attacks 1 enemy. Places a [HP Burn] debuff on the target for 2 turns if they are under a [True Fear] debuff or a [Decrease ATK] debuff. Also places a [Shield] buff on this Champion for 2 turns equal to 10% of their MAX HP. Shield HP Burn	Infernal Darkness Formula: 0.27*HP Attacks all enemies. Has a 75% chance of placing a [True Fear] debuff and a 50% [Decrease ATK] debuff for 2 turns. Cooldown: 5 True Fear Decrease ATK 50%	Daemon Possession Balances the HP of all allies. The HP levels of all allies will be brought up to the level of the ally with the highest HP. After balancing HP, grants an Extra Turn. Cooldown: 6	Legion of Doom [P] Formula: -0.2DMG_MUL Formula: 0.2DMG_MUL Receives 20% less damage from Champions from the Banner Lord, High Elf, and Sacred Order Factions. If there are 2 or more Demonspawn Champions on the team alongside this Champion, increases the C. DMG of all Demonspawn Champions on the team by 20%. [C. DMG increase only works when this Champion is alive.]
Wythir the Crowned	Soul's Impalement Formula: 2.8*DEF Attacks all enemies. Has a 50% chance of placing a [Leech] debuff for 1 turn. Also places a 15% [Continuous Heal] buff on a random ally for 2 turns. Continuous Heal 15% Leech	Feel No Pain Places a 60% [Increase DEF] buff on all allies for 2 turns. Also increases the duration of all [Continuous Heal] buffs on all allies by 1 turn, then instantly activates any [Continuous Heal] buffs on all allies. Cooldown: 5 Increase DEF 60%	Azure Redeemer Formula: 0.3*HP Removes all debuffs from all allies, then heals all allies by 30% of this Champion’s MAX HP. Cooldown: 5	Eternal Flame [P] Places a 15% [Continuous Heal] buff on the ally with the lowest HP for 1 turn at the start of each turn. Continuous Heal 15%