Kamen Rider Kenzan vs Casey Jones (2012): who would win?

Kamen Rider Kenzan favored — Slight edge (~55%)

Kamen Rider Kenzan · Kamen Rider · Base

Tier
9-B, up to 1-C
Attack Potency
Wall Level, up to Complex Multiverse Level
Speed
Massively Hypersonic, up to Ftl
Durability
Wall Level, up to Complex Multiverse Level

Casey Jones (2012) · Teenage Mutant Ninja Turtles · Base

Tier
9-B
Attack Potency
Wall Level
Speed
Hypersonic
Durability
Wall Level

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