Field Researcher vs Leonardo da Vinci (Assassin's Creed): who would win?

Field Researcher favored — Slight edge (~55%)

Field Researcher · Godzilla · Base

Tier

9-C, up to 9-B

Attack Potency

Street Level, up to Wall Level

Speed

Athletic Human, up to Supersonic

Durability

Athlete Level

Leonardo da Vinci (Assassin's Creed) · Assassin's Creed · Base

Tier

10-B, up to 8-C

Attack Potency

Human Level, up to Building Level+

Speed

Average Human, up to Supersonic

Durability

Small Building Level+

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