Godzilla (Heisei) vs E-105 Zeta: who would win?

Godzilla (Heisei) favored — Slight edge (~55%)

Godzilla (Heisei) · Godzilla · Post-Supercharge

Tier
4-B
Attack Potency
Solar System Level
Speed
Subsonic, up to Massively Ftl+
Durability
Solar System Level

E-105 Zeta · Sonic · Base

Tier
4-B
Attack Potency
Solar System Level
Speed
Immobile, up to Massively Ftl
Durability
Solar System Level

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