Hellen Gravely vs The Vees: who would win?

Hellen Gravely favored — Slight edge (~55%)

Hellen Gravely · Super Mario Bros · Base

Tier
9-B, up to HIGH 8-C
Attack Potency
Wall Level, up to Large Building Level
Speed
Massively Ftl+
Durability
Large Building Level

The Vees · Hazbin Hotel · Base

Tier
9-B, up to 5-B
Attack Potency
Wall Level, up to Planet Level+
Speed
Subsonic+, up to Ftl
Durability
Building Level, up to Planet Level

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