Ekko (Arcane) vs Loki (Lego): who would win?

Ekko (Arcane) favored — Slight edge (~55%)

Ekko (Arcane) · Arcane · Season 2

Tier
8-C
Attack Potency
Building Level
Speed
Athletic Human, up to Subsonic
Durability
Building Level

Loki (Lego) · Marvel · Base

Tier
8-C
Attack Potency
Building Level
Speed
Peak Human, up to Subsonic
Durability
Wall Level

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