The Vees vs N'Doul: who would win?

The Vees favored — Slight edge (~55%)

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

N'Doul · JoJo's Bizarre Adventure · Base

Tier
9-B
Attack Potency
Wall Level
Speed
Average Human, up to Massively Ftl
Durability
Building Level

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