Demeter (Riordan) vs Nomad: who would win?

Nomad favored — Slight edge (~55%)

Demeter (Riordan) · Percy Jackson · Base

Tier

HIGH 6-A, up to HIGH 4-C

Attack Potency

Multi-Continent Level, up to Large Star Level

Speed

Ftl, up to Massively Ftl+

Durability

Multi-Continent Level, up to Large Star Level

Nomad · Star Trek · Base

Tier

HIGH 6-A

Attack Potency

Multi-Continent Level

Speed

Massively Ftl

Durability

Multi-Continent Level

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