The Vees vs The Sarlacc: 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

The Sarlacc · Star Wars · Base

Tier
9-B, up to 7-B
Attack Potency
Wall Level, up to City Level
Speed
Immobile
Durability
Large Building Level, up to City Level

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