Tachibana vs Diavolo: who would win?

Diavolo favored — Slight edge (~55%)

Tachibana · Crows x Worst · Base

Tier

10-A

Attack Potency

Athlete Level

Speed

Peak Human

Durability

Athlete Level

Diavolo · JoJo's Bizarre Adventure · Doppio

Tier

10-A, up to HIGH 8-C

Attack Potency

Athlete Level, up to Large Building Level

Speed

Massively Ftl

Durability

Athlete Level, up to Large Building Level

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