Slan vs Earl of Lemongrab 3: who would win?

Slan favored — Favored (~65%)

Slan · Berserk · Base

Tier
7-A, up to 6-C
Attack Potency
Mountain Level+, up to Island Level
Speed
Massively Hypersonic+
Durability
Mountain Level+

Earl of Lemongrab 3 · Adventure Time · Base

Tier
HIGH 7-A
Attack Potency
Large Mountain Level
Speed
Superhuman
Durability
Small Building Level, up to Large Mountain Level

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