Umber Hulk vs Puri-Puri-Prisoner: who would win?

Umber Hulk favored — Slight edge (~55%)

Umber Hulk · Dungeons & Dragons · Truly Horrid Umber Hulk

Tier

LOW 7-B

Attack Potency

Small City Level

Speed

Relativistic+, up to Ftl+

Durability

Small City Level

Puri-Puri-Prisoner · One-Punch Man · Monster Association Arc

Tier

LOW 7-B, up to 6-B

Attack Potency

Small City Level, up to Country Level

Speed

Massively Hypersonic, up to Massively Hypersonic+

Durability

Small City Level, up to Country Level

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