Mephet'ran the Deceiver vs Monspeet: who would win?

Too close to call

Mephet'ran the Deceiver · Warhammer 40,000 · True Power/War in Heaven Deceiver

Tier

4-B, up to 1-A

Attack Potency

Solar System Level, up to Outerverse Level

Speed

Hypersonic, up to Massively Ftl+

Durability

Planet Level

Monspeet · Nanatsu no Taizai · Base

Tier

4-B

Attack Potency

Solar System Level

Speed

Relativistic

Durability

Island Level

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