head to head
Phasmophobia asks more than Plants vs. Zombies 2: It's About Time, and the gap is variance.

Variance · Systems & Chaos
A cooperative horror investigation about identifying a randomised ghost from evidence.

Optimization · Pure Optimization
Lane-defense economy optimization against semi-randomised zombie waves.
Phasmophobia leans Variance (Systems & Chaos); Plants vs. Zombies 2: It's About Time leans Optimization (Pure Optimization).
Plants vs. Zombies 2: It's About Time leans a little harder on execution, though the gap is small.
Phasmophobia
Minimal aiming; you just walk and use tools.
Plants vs. Zombies 2: It's About Time
Tapping plants quickly only matters in surge moments
Phasmophobia leans a little harder on reads, though the gap is small.
Phasmophobia
Ghost behaviour is randomised, not adaptive to you.
Plants vs. Zombies 2: It's About Time
Zombie waves are announced patterns, not minds
Phasmophobia leans clearly harder on variance.
Phasmophobia
Ghost type and evidence rolls are hidden each contract.
Plants vs. Zombies 2: It's About Time
Wave compositions and plant-food drops add per-level randomness
Plants vs. Zombies 2: It's About Time leans a little harder on optimization, though the gap is small.
Phasmophobia
Evidence trees and equipment loadouts are solvable checklists.
Plants vs. Zombies 2: It's About Time
Lawn economy and plant placement are the solvable core
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.