Chitauri vs Philinosoma: who would win?

Philinosoma favored — Slight edge (~55%)

Chitauri · Marvel · Infantry

Tier
8-C
Attack Potency
Building Level
Speed
Peak Human, up to Subsonic
Durability
Small Building Level, up to Building Level

Philinosoma · Kaiju No. 8 · Base

Tier
8-C
Attack Potency
Building Level
Speed
Superhuman
Durability
Building Level

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