Iron Man (Marvel Tōkon) vs Ryubee Sonozaki: who would win?

Iron Man (Marvel Tōkon) favored — Slight edge (~55%)

Iron Man (Marvel Tōkon) · Marvel · Base

Tier

10-B, up to 4-C

Attack Potency

Human Level, up to Star Level

Speed

Supersonic+

Durability

Human Level, up to Star Level

Ryubee Sonozaki · Kamen Rider · Base

Tier

10-B, up to LOW 7-B

Attack Potency

Human Level, up to Small City Level

Speed

Average Human, up to Ftl

Durability

Human Level, up to Small City Level

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