Coily Rattler vs Feixiao: who would win?

Feixiao favored — Favored (~65%)

Coily Rattler · Kirby · Base

Tier

4-A

Attack Potency

Multi-Solar System Level

Speed

Massively Ftl+

Durability

Multi-Solar System Level, up to Low Multiverse Level

Feixiao · Honkai: Star Rail · Base

Tier

3-C, up to 2-A

Attack Potency

Galaxy Level, up to Multiverse Level+

Speed

Ftl+

Durability

Galaxy Level

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