Firestorm (Pre-Crisis) vs Frankenstein (Godzilla): who would win?

Firestorm (Pre-Crisis) favored — Slight edge (~55%)

Firestorm (Pre-Crisis) · DC · Base

Tier

HIGH 6-B

Attack Potency

Large Country Level

Speed

Supersonic, up to Massively Ftl+

Durability

City Level

Frankenstein (Godzilla) · Godzilla · Base

Tier

HIGH 6-B

Attack Potency

Large Country Level

Speed

Superhuman, up to Supersonic

Durability

Town Level, up to Large Country Level

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