Dragon Turtle vs Siren: who would win?

Siren favored — Slight edge (~55%)

Dragon Turtle · Dungeons & Dragons · Base

Tier

8-C, up to 6-C

Attack Potency

Building Level, up to Island Level+

Speed

Hypersonic+, up to Ftl+

Durability

Building Level, up to Island Level+

Siren · God of War · Base

Tier

8-C

Attack Potency

Building Level

Speed

Sub-Relativistic+

Durability

Building Level

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