Kuroyoru Umidori vs Laser Lance: who would win?

Laser Lance favored — Slight edge (~55%)

Kuroyoru Umidori · Toaru Majutsu no Index · With Extra Arms

Tier

8-A, up to 7-C

Attack Potency

Multi-City Block Level, up to Town Level

Speed

Peak Human, up to Supersonic

Durability

Street Level, up to Town Level

Laser Lance · Ben 10 · Base

Tier

8-A

Attack Potency

Multi-City Block Level

Speed

Relativistic

Durability

Unknown

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