Kamen Rider G vs Rodimus: who would win?

Too close to call

Kamen Rider G · Kamen Rider · Kamen Rider G

Tier
LOW 5-B, up to 1-C
Attack Potency
Small Planet Level, up to Complex Multiverse Level
Speed
Supersonic, up to Massively Ftl+
Durability
Small Planet Level, up to Complex Multiverse Level

Rodimus · Transformers · Base

Tier
LOW 5-B, up to 1-A
Attack Potency
Small Planet Level, up to Outerverse Level
Speed
Supersonic, up to Immeasurable
Durability
Small Planet Level

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