Esgar vs Ozai: who would win?

Ozai favored — Slight edge (~55%)

Esgar · Elden Ring · Base

Tier

LOW 7-C, up to HIGH 7-C

Attack Potency

Small Town Level, up to Large Town Level

Speed

High Hypersonic

Durability

Small Town Level, up to Large Town Level

Ozai · Avatar: The Last Airbender · With Sozin's comet

Tier

LOW 7-C, up to 7-C

Attack Potency

Small Town Level, up to Town Level

Speed

Massively Hypersonic+

Durability

Small Town Level, up to Town Level

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