Manda (Godzilla) vs Radioactive Man: who would win?

Radioactive Man favored — Favored (~65%)

Manda (Godzilla) · Godzilla · Base

Tier
HIGH 8-C
Attack Potency
Large Building Level
Speed
Superhuman+, up to Subsonic
Durability
Mountain Level+

Radioactive Man · Marvel · Base

Tier
HIGH 8-C
Attack Potency
Large Building Level
Speed
Massively Ftl+
Durability
Planet Level

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