Genius Loci vs Xeno'Jiiva: who would win?

Genius Loci favored — Slight edge (~55%)

Genius Loci · Dungeons & Dragons · Base

Tier

LOW 6-B, up to 6-B

Attack Potency

Small Country Level, up to Country Level

Speed

Relativistic+, up to Ftl+

Durability

Small Country Level, up to Country Level

Xeno'Jiiva · Monster Hunter · Base

Tier

LOW 6-B

Attack Potency

Small Country Level

Speed

Massively Hypersonic, up to Massively Ftl+

Durability

Small Country Level

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