Kama (Fate) vs Niang-Niang: who would win?

Niang-Niang favored — Slight edge (~55%)

Kama (Fate) · Nasuverse · Beast III/Lapse

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Immeasurable, up to Omnipresent

Durability

Complex Multiverse Level

Niang-Niang · Toaru Majutsu no Index · Base

Tier

HIGH 1-C

Attack Potency

High Complex Multiverse Level

Speed

Sub-Relativistic

Durability

High Complex Multiverse Level

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