Mega Man (Megamix/Gigamix) vs Lucifer Morningstar (Hazbin Hotel): who would win?

Lucifer Morningstar (Hazbin Hotel) favored — Slight edge (~55%)

Mega Man (Megamix/Gigamix) · Mega Man · Base

Tier
5-C, up to 5-B
Attack Potency
Moon Level+, up to Planet Level
Speed
Subsonic, up to Massively Ftl
Durability
Moon Level+, up to Planet Level

Lucifer Morningstar (Hazbin Hotel) · Hazbin Hotel · Base

Tier
LOW 5-B, up to 5-B
Attack Potency
Small Planet Level, up to Planet Level+
Speed
Supersonic, up to Ftl
Durability
Small Planet Level, up to Planet Level+

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