Soshiro Hoshina vs Leo Corbett: who would win?

Leo Corbett favored — Slight edge (~55%)

Soshiro Hoshina · Kaiju No. 8 · Defense Force Suit

Tier
LOW 7-C, up to 7-A
Attack Potency
Small Town Level, up to Mountain Level+
Speed
Subsonic, up to High Hypersonic
Durability
Small Town Level, up to Mountain Level+

Leo Corbett · Power Rangers · Magna Defender arc

Tier
LOW 7-C, up to 6-C
Attack Potency
Small Town Level, up to Island Level
Speed
Massively Hypersonic, up to Massively Ftl+
Durability
Small Town Level, up to Island Level

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