Andromeda Shun vs Osiris: who would win?

Osiris favored — Slight edge (~55%)

Andromeda Shun · Saint Seiya · Base

Tier

6-A, up to LOW 1-C

Attack Potency

Continent Level, up to Low Complex Multiverse Level

Speed

Transonic, up to Infinite Speed

Durability

Continent Level, up to Low Complex Multiverse Level

Osiris · Percy Jackson · Base

Tier

6-A, up to HIGH 6-A

Attack Potency

Continent Level, up to Multi-Continent Level

Speed

High Hypersonic+

Durability

Continent Level, up to Multi-Continent Level

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