Palafin vs Griffith: who would win?

Griffith favored — Slight edge (~55%)

Palafin · Pokémon · Hero Mode

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

Griffith · Berserk · Incarnated Griffith / Femto

Tier
HIGH 7-A
Attack Potency
Large Mountain Level
Speed
Massively Hypersonic
Durability
Large Mountain Level

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