Atom Eve (Comics) vs White Diamond: who would win?

White Diamond favored — Slight edge (~55%)

Atom Eve (Comics) · Invincible · First Resurrection

Tier
LOW 5-B
Attack Potency
Small Planet Level
Speed
Massively Hypersonic+, up to Relativistic+
Durability
Athlete Level, up to Small Planet Level

White Diamond · Steven Universe · Base

Tier
5-C
Attack Potency
Moon Level+
Speed
Relativistic, up to Massively Ftl+
Durability
Moon Level+

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