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

Optimization · Pure Optimization
A life simulator where planning schedules and needs against a solvable system is the real game.

Optimization · Pure Optimization
A zen object-placement game where reading spatial and narrative context determines where each item belongs.
The Sims 4 leans Optimization (Pure Optimization); Unpacking 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.
The Sims 4
no physical skill ceiling at all
Unpacking
Item placement requires light spatial judgment but no precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
The Sims 4
no opponents, simulated NPCs only
Unpacking
Solo meditative game with no opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
The Sims 4
minor random events and needs decay
Unpacking
Item and room combinations are deterministic across playthroughs
The Sims 4 leans a little harder on optimization, though the gap is small.
The Sims 4
life and career system optimization dominant
Unpacking
Understanding acceptable placement rules and story logic guides packing decisions
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.