Yura vs Acrobatic Silky: who would win?

Yura favored — Slight edge (~55%)

Yura · Kagurabachi · Base

Tier
9-A, up to 7-B
Attack Potency
Small Building Level, up to City Level
Speed
Massively Hypersonic, up to Sub-Relativistic
Durability
Small Building Level, up to City Level

Acrobatic Silky · Dandadan · Base

Tier
9-A
Attack Potency
Small Building Level
Speed
Superhuman
Durability
Small Building Level+

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