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 · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.

Optimization · Practiced Mastery
Learning boss patterns and tuning command-deck builds with moderate action demands.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Kingdom Hearts 3D: Dream Drop Distance leans Optimization (Practiced Mastery).
Kingdom Hearts 3D: Dream Drop Distance leans a little harder on execution, though the gap is small.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Kingdom Hearts 3D: Dream Drop Distance
Flowmotion combat asks moderate timing, rarely punishing
Kingdom Hearts 3D: Dream Drop Distance leans a little harder on reads, though the gap is small.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Kingdom Hearts 3D: Dream Drop Distance
Bosses run scripted patterns with no player modelling
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Kingdom Hearts 3D: Dream Drop Distance
Dream Eater drops and spirit rolls add mild randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
Kingdom Hearts 3D: Dream Drop Distance
Command decks, spirit builds and boss patterns are learnable systems
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.