Typhon (Riordan) vs R-System: who would win?

Typhon (Riordan) favored — Slight edge (~55%)

Typhon (Riordan) · Percy Jackson · Base

Tier

HIGH 6-A, up to HIGH 4-C

Attack Potency

Multi-Continent Level, up to Large Star Level

Speed

Superhuman

Durability

Multi-Continent Level, up to Large Star Level

R-System · Fairy Tail · Base

Tier

HIGH 6-A

Attack Potency

Multi-Continent Level

Speed

Unknown

Durability

Island Level

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