Bobby Jean vs Gokusai Kaibi: who would win?

Bobby Jean favored — Slight edge (~55%)

Bobby Jean · JoJo's Bizarre Adventure · Base

Tier

9-C

Attack Potency

Street Level

Speed

Average Human, up to Transonic

Durability

Athlete Level

Gokusai Kaibi · Toaru Majutsu no Index · Base

Tier

9-C, up to 9-B

Attack Potency

Street Level, up to Wall Level

Speed

Average Human

Durability

Human Level

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