Delphinus Mii vs Apophis: who would win?

Apophis favored — Slight edge (~55%)

Delphinus Mii · Saint Seiya · Post Training with Marin

Tier

HIGH 6-A

Attack Potency

Multi-Continent Level

Speed

Transonic, up to High Hypersonic

Durability

Multi-Continent Level

Apophis · Percy Jackson · Base

Tier

HIGH 6-A, up to 5-B

Attack Potency

Multi-Continent Level, up to Planet Level

Speed

High Hypersonic+

Durability

Multi-Continent Level

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