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 economy optimization against semi-randomised zombie waves.

Optimization · Systems & Chaos
A fairy-tale adventure testing patient discovery of fixed puzzle solutions.
Plants vs. Zombies 2: It's About Time leans Optimization (Pure Optimization); The Night of the Rabbit leans Optimization (Systems & Chaos).
Plants vs. Zombies 2: It's About Time leans a little harder on execution, though the gap is small.
Plants vs. Zombies 2: It's About Time
Tapping plants quickly only matters in surge moments
The Night of the Rabbit
Pointing and clicking has no motor ceiling
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
The Night of the Rabbit
No opponent of any kind to predict
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
The Night of the Rabbit
Puzzle solutions are hidden information until discovered
Plants vs. Zombies 2: It's About Time leans a little harder on optimization, though the gap is small.
Plants vs. Zombies 2: It's About Time
Lawn economy and plant placement are the solvable core
The Night of the Rabbit
A walkthrough trivialises it - puzzles have fixed solutions
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.