Haltmann Works Company vs Set (Riordan): who would win?

Haltmann Works Company favored — Slight edge (~55%)

Haltmann Works Company · Kirby · Base

Tier

6-A, up to 2-C

Attack Potency

Continent Level, up to Low Multiverse Level

Speed

Unknown

Durability

Unknown

Set (Riordan) · Percy Jackson · Base

Tier

HIGH 6-B, up to HIGH 6-A

Attack Potency

Large Country Level, up to Multi-Continent Level

Speed

High Hypersonic+

Durability

Large Country Level, up to Multi-Continent Level

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