Quicksilver (Ultimate) vs Charlie Morningstar: who would win?

Quicksilver (Ultimate) favored — Slight edge (~55%)

Quicksilver (Ultimate) · Marvel · Base

Tier
9-C
Attack Potency
Street Level
Speed
Massively Hypersonic+
Durability
Street Level

Charlie Morningstar · Hazbin Hotel · Base

Tier
9-C, up to 5-B
Attack Potency
Street Level, up to Planet Level+
Speed
Subsonic+, up to Supersonic
Durability
Street Level, up to Planet Level+

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