Maokai vs Sub Energy: who would win?

Maokai favored — Slight edge (~55%)

Maokai · League of Legends · Worldbreaker

Tier
HIGH 6-A
Attack Potency
Multi-Continent Level
Speed
Subsonic
Durability
Multi-Continent Level

Sub Energy · Ben 10 · Base

Tier
HIGH 6-A
Attack Potency
Multi-Continent Level
Speed
Immobile
Durability
Multi-Continent Level

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