Ryomen Sukuna vs Ariu Mikaboshi: who would win?

Too close to call

Ryomen Sukuna · Jujutsu Kaisen · 15/16 Fingers

Tier
7-B
Attack Potency
City Level
Speed
Hypersonic
Durability
Large Town Level

Ariu Mikaboshi · Kagurabachi · Base

Tier
7-B
Attack Potency
City Level
Speed
Massively Hypersonic, up to Sub-Relativistic
Durability
City Block Level, up to City Level

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