Metal Gear REX vs Rosine: who would win?

Too close to call

Metal Gear REX · Metal Gear · Base

Tier
8-A, up to 7-C
Attack Potency
Multi-City Block Level, up to Town Level
Speed
Subsonic, up to Relativistic+
Durability
Multi-City Block Level

Rosine · Berserk · Base

Tier
8-A
Attack Potency
Multi-City Block Level
Speed
Subsonic+, up to Supersonic
Durability
Multi-City Block Level

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