Isao Shinomiya vs Lei Wulong: who would win?

Lei Wulong favored — Slight edge (~55%)

Isao Shinomiya · Kaiju No. 8 · Base

Tier
7-A, up to 6-A
Attack Potency
Mountain Level+, up to Continent Level
Speed
High Hypersonic+, up to Ftl
Durability
Mountain Level+

Lei Wulong · Tekken · Base

Tier
7-A
Attack Potency
Mountain Level+
Speed
Sub-Relativistic+
Durability
Mountain Level+

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