Kafka Hibino vs Offmon: who would win?

Kafka Hibino favored — Slight edge (~55%)

Kafka Hibino · Kaiju No. 8 · Full Transformation (Post-Bond)

Tier
6-A, up to HIGH 6-A
Attack Potency
Continent Level, up to Multi-Continent Level
Speed
Ftl
Durability
Continent Level, up to Multi-Continent Level

Offmon · Digimon · Shutmon

Tier
HIGH 6-A
Attack Potency
Unknown
Speed
Subsonic, up to Relativistic
Durability
Multi-Continent Level

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