Ditto (Ben 10) vs Kamen Rider: who would win?

Kamen Rider favored — Slight edge (~55%)

Ditto (Ben 10) · Ben 10 · Omniverse

Tier

4-B

Attack Potency

Brown Dwarf Level, up to Solar System Level

Speed

Average Human, up to Massively Ftl+

Durability

Solar System Level

Kamen Rider · Godzilla · Base

Tier

HIGH 4-C

Attack Potency

Large Star Level

Speed

Supersonic, up to Ftl

Durability

Large Star Level

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