Griffon Minos vs Romeo: who would win?

Griffon Minos favored — Slight edge (~55%)

Griffon Minos · Saint Seiya · Base

Tier

4-A

Attack Potency

Multi-Solar System Level

Speed

Speed Of Light

Durability

Multi-Solar System Level

Romeo · Minecraft · Base

Tier

4-A, up to HIGH 3-A

Attack Potency

Multi-Solar System Level, up to High Universe Level

Speed

Average Human, up to Subsonic

Durability

Multi-Solar System Level, up to High Universe Level

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