Futaba Sakura vs Acorn: who would win?

Acorn favored — Favored (~65%)

Futaba Sakura · Megami Tensei · Base

Tier

LOW 2-C, up to 1-A

Attack Potency

Universe Level+, up to Outerverse Level

Speed

Immeasurable

Durability

Universe Level+, up to Outerverse Level

Acorn · Plants vs. Zombies · Acorn

Tier

2-C

Attack Potency

Low Multiverse Level

Speed

Massively Hypersonic, up to Relativistic+

Durability

Low Multiverse Level

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