Belial (Dungeons and Dragons) vs Laplace (Light Novel): who would win?

Too close to call

Belial (Dungeons and Dragons) · Dungeons & Dragons · True Form

Tier: LOW 2-C
Attack Potency: Universe Level+
Speed: Relativistic+, up to Ftl+
Durability: Universe Level+

Laplace (Light Novel) · Tensei Shitara Slime Datta Ken · Base

Tier: LOW 2-C
Attack Potency: Universe Level+
Speed: Relativistic+
Durability: Universe Level+

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