Bolt vs Mina Ashiro: who would win?

Bolt favored — Slight edge (~55%)

Bolt · Invincible · Base

Tier
HIGH 6-B
Attack Potency
Large Country Level
Speed
Unknown
Durability
Large Country Level

Mina Ashiro · Kaiju No. 8 · Base

Tier
HIGH 6-B, up to HIGH 6-A
Attack Potency
Large Country Level, up to Multi-Continent Level
Speed
High Hypersonic, up to Ftl
Durability
Mountain Level+, up to Large Country Level

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