Sakura Ogami vs Matthew: who would win?

Matthew favored — Slight edge (~55%)

Sakura Ogami · Danganronpa · Base

Tier
HIGH 7-C
Attack Potency
Large Town Level
Speed
High Hypersonic, up to Relativistic+
Durability
Large Town Level

Matthew · Adventure Time · Base

Tier
HIGH 7-C
Attack Potency
Large Town Level
Speed
Massively Hypersonic+
Durability
Large Town Level

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