Rakshasa vs Kūgo Ginjō: who would win?

Rakshasa favored — Slight edge (~55%)

Rakshasa · Dungeons & Dragons · Overlord

Tier

HIGH 6-A, up to LOW 2-C

Attack Potency

Multi-Continent Level, up to Universe Level+

Speed

Relativistic+, up to Infinite

Durability

Multi-Continent Level, up to Universe Level+

Kūgo Ginjō · Bleach · Lost Agent Arc

Tier

HIGH 6-A, up to 4-A

Attack Potency

Multi-Continent Level, up to Multi-Solar System Level

Speed

Massively Hypersonic

Durability

Multi-Continent Level, up to Multi-Solar System Level

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