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
An open-ended needs-and-money system that rewards efficient scheduling.

Optimization · Pure Optimization
Open-world detective work testing evidence deduction without hand-holding.
The Sims leans Optimization (Pure Optimization); The Sinking City leans Optimization (Pure Optimization).
The Sinking City leans a little harder on execution, though the gap is small.
The Sims
Clicking menus has no physical ceiling
The Sinking City
Clunky combat is deliberately undemanding
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
The Sims
Sims run need-driven scripts, not minds
The Sinking City
Monsters and citizens follow fixed scripts
The Sinking City leans a little harder on variance, though the gap is small.
The Sims
Event rolls add flavour, all quickly mapped
The Sinking City
Case clues are hidden information until investigated
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
The Sims
Need scheduling, career grinding and money loops are solvable
The Sinking City
Cross-referencing evidence and city archives is the deduction core
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.