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 historical worker-placement economy testing allocation efficiency against event risk.
Plants vs. Zombies leans Optimization (Pure Optimization); Predynastic Egypt leans Optimization (Pure Optimization).
Plants vs. Zombies leans a little harder on execution, though the gap is small.
Plants vs. Zombies
Clicking to plant, minimal pressure
Predynastic Egypt
Turn-based worker placement has no physical layer
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
Predynastic Egypt
Events are scripted-historical, nothing adapts
Predynastic Egypt leans a little harder on variance, though the gap is small.
Plants vs. Zombies
Wave timing and lane pressure vary mildly
Predynastic Egypt
Event rolls and exploration outcomes inject managed risk
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Plants vs. Zombies
Sun economy and lane setups are near-solvable
Predynastic Egypt
Worker allocation and tech ordering is a solvable economy
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.