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

Optimization · Pure Optimization
Open-ended puzzles testing vocabulary-driven creative problem-solving more than any reflex.

Optimization · Pure Optimization
An open-ended needs-and-money system that rewards efficient scheduling.
Scribblenauts Unlimited 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.
Scribblenauts Unlimited
Typing words is the only physical demand
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.
Scribblenauts Unlimited
Puzzle NPCs are static requests, not minds
The Sims
Sims run need-driven scripts, not minds
The Sims leans a little harder on variance, though the gap is small.
Scribblenauts Unlimited
Puzzles are visible; nothing meaningful is hidden
The Sims
Event rolls add flavour, all quickly mapped
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Scribblenauts Unlimited
Finding objects that satisfy puzzle constraints is creative problem-solving
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.