Kaiju No. 15 vs Void (Berserk): who would win?

Void (Berserk) favored — Slight edge (~55%)

Kaiju No. 15 · Kaiju No. 8 · Base

Tier
7-A
Attack Potency
Mountain Level+
Speed
High Hypersonic, up to Ftl
Durability
Mountain Level+

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+

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