Void (Berserk) vs Zaneri: who would win?

Zaneri favored — Slight edge (~55%)

Void (Berserk) · Berserk · Base

Tier
7-A, up to 6-C
Attack Potency
Mountain Level+, up to Island Level
Speed
Massively Hypersonic+
Durability
Mountain Level+

Zaneri · Nanatsu no Taizai · Base

Tier
HIGH 7-A
Attack Potency
Unknown
Speed
Sub-Relativistic
Durability
Unknown

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