Jumping Spider vs The Cube: who would win?

Too close to call

Jumping Spider · One-Punch Man · Base

Tier: 8-B
Attack Potency: City Block Level
Speed: Hypersonic+
Durability: City Block Level

The Cube · Fortnite · Purple

Tier: 8-B
Attack Potency: City Block Level
Speed: Supersonic+
Durability: City Block Level

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