head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
Lane-defense economy optimization against semi-randomised zombie waves.

Optimization · Pure Optimization
A chariot racing team management simulation.
Plants vs. Zombies 2: It's About Time leans Optimization (Pure Optimization); Qvadriga leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Plants vs. Zombies 2: It's About Time
Tapping plants quickly only matters in surge moments
Qvadriga
minimal direct racing control, mostly management
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Plants vs. Zombies 2: It's About Time
Zombie waves are announced patterns, not minds
Qvadriga
AI charioteers scripted, not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Plants vs. Zombies 2: It's About Time
Wave compositions and plant-food drops add per-level randomness
Qvadriga
race outcomes have randomized elements
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Plants vs. Zombies 2: It's About Time
Lawn economy and plant placement are the solvable core
Qvadriga
team and chariot management strategy
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.