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
A career sim about diagnosing, repairing and assembling customer PCs on a budget.

Optimization · Pure Optimization
A life simulator where planning schedules and needs against a solvable system is the real game.
PC Building Simulator leans Optimization (Pure Optimization); The Sims 4 leans Optimization (Pure Optimization).
PC Building Simulator leans a little harder on execution, though the gap is small.
PC Building Simulator
Careful part assembly is procedural, not twitchy.
The Sims 4
no physical skill ceiling at all
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
PC Building Simulator
No opponent; clients issue fixed job tickets.
The Sims 4
no opponents, simulated NPCs only
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
PC Building Simulator
Job orders vary slightly day to day.
The Sims 4
minor random events and needs decay
PC Building Simulator leans a little harder on optimization, though the gap is small.
PC Building Simulator
Diagnosing builds and budgeting parts for jobs is the whole game.
The Sims 4
life and career system optimization dominant
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.