Sphectra vs Metarex: who would win?

Too close to call

Sphectra · Godzilla · Base

Tier

5-B

Attack Potency

Planet Level+

Speed

Subsonic+, up to Massively Ftl

Durability

Planet Level+

Metarex · Sonic · Base

Tier

5-B, up to 3-A

Attack Potency

Planet Level+, up to Universe Level

Speed

Unknown

Durability

Unknown

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