Grimmkin vs Sylvia: who would win?

Too close to call

Grimmkin · Hollow Knight · Base

Tier

10-C, up to 9-A

Attack Potency

Below Average Human Level, up to Small Building Level

Speed

Below Average Human

Durability

Below Average Human Level, up to Small Building Level

Sylvia · Star Trek · Base

Tier

10-C, up to HIGH 6-A

Attack Potency

Below Average Human Level, up to Multi-Continent Level

Speed

Below Average Human, up to Superhuman

Durability

Below Average Human Level, up to Multi-Continent Level

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