Gil-galad vs Fūko Izumo: who would win?

Fūko Izumo favored — Slight edge (~55%)

Gil-galad · Lord of the Rings · Base

Tier

HIGH 7-A, up to HIGH 3-A

Attack Potency

Large Mountain Level, up to High Universe Level

Speed

Supersonic+, up to Massively Ftl+

Durability

Large Mountain Level, up to High Universe Level

Fūko Izumo · Undead Unluck · 101st Loop

Tier

HIGH 7-A

Attack Potency

Large Mountain Level

Speed

Massively Hypersonic+

Durability

Large Mountain Level

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