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 haunting puzzle-strategy game testing combo planning against rule-driven mortals.

Optimization · Pure Optimization
An open-ended needs-and-money system that rewards efficient scheduling.
Ghost Master leans Optimization (Pure Optimization); The Sims 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.
Ghost Master
Assigning ghosts to fetters needs no dexterity
The Sims
Clicking menus has no physical ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Ghost Master
Mortal AI panics by rules, not by modelling you
The Sims
Sims run need-driven scripts, not minds
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Ghost Master
Mortal behaviour wanders but follows mappable logic
The Sims
Event rolls add flavour, all quickly mapped
Ghost Master leans a little harder on optimization, though the gap is small.
Ghost Master
Ghost-power combos and plasm economy solve each haunting
The Sims
Need scheduling, career grinding and money loops are solvable
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.