Kamen Rider Solomon vs Zen'ō: who would win?

Zen'ō favored — Slight edge (~55%)

Kamen Rider Solomon · Kamen Rider · Kamen Rider Solomon (36-40)

Tier

1-C, up to HIGH 1-A

Attack Potency

Complex Multiverse Level, up to Outerversal

Speed

Ftl, up to Massively Ftl+

Durability

Complex Multiverse Level

Zen'ō · Dragon Ball · Base

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Massively Ftl+

Durability

Complex Multiverse Level

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