Sabretooth (Marvel Comics) vs Zero (Web Novel): who would win?

Zero (Web Novel) favored — Slight edge (~55%)

Sabretooth (Marvel Comics) · Marvel · Base

Tier
HIGH 3-A
Attack Potency
High Universe Level
Speed
Hypersonic
Durability
Small Building Level, up to High Universe Level

Zero (Web Novel) · Tensei Shitara Slime Datta Ken · Fused with Ramaris' Labyrinth

Tier
3-A
Attack Potency
Universe Level
Speed
Ftl
Durability
Universe Level

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