Stormvermin vs Aira Shiratori: who would win?

Too close to call

Stormvermin · Warhammer Fantasy · Base

Tier
9-A, up to HIGH 8-C
Attack Potency
Small Building Level, up to Large Building Level
Speed
Superhuman, up to Supersonic
Durability
Small Building Level, up to Large Building Level

Aira Shiratori · Dandadan · Base

Tier
9-A, up to 8-C
Attack Potency
Small Building Level, up to Building Level
Speed
Superhuman
Durability
Small Building Level, up to Building Level

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