Kamen Rider Leangle vs The Engineer: who would win?

The Engineer favored — Slight edge (~55%)

Kamen Rider Leangle · Kamen Rider · Kamen Rider Leangle

Tier
7-C
Attack Potency
Town Level, up to Town Level+
Speed
High Hypersonic+
Durability
Town Level, up to Town Level+

The Engineer · DC · Base

Tier
7-C
Attack Potency
Town Level
Speed
Relativistic, up to Relativistic+
Durability
Town Level

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