The Dunwich Horror vs Tidal Wave of Darkness: who would win?

Too close to call

The Dunwich Horror · Cthulhu Mythos · Base

Tier: HIGH 8-C
Attack Potency: Large Building Level
Speed: Superhuman
Durability: Unknown

Tidal Wave of Darkness · Berserk · Base

Tier: HIGH 8-C
Attack Potency: Large Building Level
Speed: Unknown
Durability: Unknown

A heuristic estimate from normalized VS Battles Wiki stats: tier, attack potency, speed and durability.