Dhalsim vs Gray Demon: who would win?

Gray Demon favored — Slight edge (~55%)

Dhalsim · Street Fighter · Base

Tier

HIGH 7-A

Attack Potency

Large Mountain Level

Speed

High Hypersonic, up to Massively Hypersonic+

Durability

Large Mountain Level

Gray Demon · Nanatsu no Taizai · Base

Tier

HIGH 7-A

Attack Potency

Large Mountain Level

Speed

Sub-Relativistic

Durability

Large Mountain Level

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