Aizono Mio vs Drive Knight: who would win?

Drive Knight favored — Slight edge (~55%)

Aizono Mio · Toaru Majutsu no Index · Base

Tier

9-C, up to 8-C

Attack Potency

Street Level, up to Building Level

Speed

Transonic

Durability

Street Level, up to Building Level

Drive Knight · One-Punch Man · Base

Tier

9-C, up to 6-B

Attack Potency

Street Level, up to Country Level

Speed

Massively Hypersonic+

Durability

Street Level, up to Country Level

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