head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Pure Optimization
Lane defense classic about managing a sun economy against shambling waves.

Optimization · Pure Optimization
A first-person farming game about wrangling adorable slimes for plorts.
Plants vs. Zombies leans Optimization (Pure Optimization); Slime Rancher leans Optimization (Pure Optimization).
Slime Rancher leans a little harder on execution, though the gap is small.
Plants vs. Zombies
Clicking to plant, minimal pressure
Slime Rancher
Vacuum aiming is gentle.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Plants vs. Zombies
Zombie waves follow set compositions
Slime Rancher
Slimes follow scripted behaviors.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Plants vs. Zombies
Wave timing and lane pressure vary mildly
Slime Rancher
Plort prices and slime spawns vary.
Plants vs. Zombies leans a little harder on optimization, though the gap is small.
Plants vs. Zombies
Sun economy and lane setups are near-solvable
Slime Rancher
Ranch layout and economy reward planning.
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.