Jason (Fortnite) vs Genichi Sojo: who would win?

Genichi Sojo favored — Slight edge (~55%)

Jason (Fortnite) · Fortnite · Base

Tier
9-A
Attack Potency
Small Building Level+
Speed
Average Human, up to Supersonic+
Durability
Small Building Level+, up to Building Level

Genichi Sojo · Kagurabachi · Base

Tier
9-A, up to 8-B
Attack Potency
Small Building Level, up to City Block Level
Speed
Massively Hypersonic, up to Massively Hypersonic+
Durability
Small Building Level, up to City Block Level

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