The Red Stone of Aja vs Carapar: who would win?

The Red Stone of Aja favored — Slight edge (~55%)

The Red Stone of Aja · JoJo's Bizarre Adventure · Maximum Power

Tier

7-A

Attack Potency

Mountain Level+

Speed

Speed Of Light

Durability

Unknown

Carapar · Bionicle · Base

Tier

7-A, up to 6-C

Attack Potency

Mountain Level, up to Island Level

Speed

Massively Hypersonic+, up to Relativistic

Durability

Mountain Level, up to Island Level

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