The Original Starwalker vs Nosferatu Zodd: who would win?

Nosferatu Zodd favored — Slight edge (~55%)

The Original Starwalker · Undertale · Base

Tier
8-A
Attack Potency
Multi-City Block Level
Speed
Average Human, up to Ftl
Durability
Multi-City Block Level

Nosferatu Zodd · Berserk · Base

Tier
8-A
Attack Potency
Multi-City Block Level
Speed
Hypersonic, up to Massively Hypersonic+
Durability
Multi-City Block Level

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