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 immersive-sim RPG demanding intricate build optimisation and resource management aboard a hostile alien-infested starship.

Optimization · Pure Optimization
A dense action RPG where mastering weapon affinity crafting and risk-chain mechanics against fixed enemies is the game.
System Shock 2 leans Optimization (Pure Optimization); Vagrant Story leans Optimization (Pure Optimization).
System Shock 2 leans a little harder on execution, though the gap is small.
System Shock 2
Weapon degradation and limited stats moderate the raw aim ceiling
Vagrant Story
Break Arts timing and chain management require active engagement
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
System Shock 2
All enemies are scripted with fixed patrol and attack routines
Vagrant Story
All enemies and bosses follow fixed AI scripts
System Shock 2 leans a little harder on variance, though the gap is small.
System Shock 2
Random loot locations and psi powers introduce run-to-run variance
Vagrant Story
Affinity system has some randomness in chain outcomes
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
System Shock 2
Deep build tree and resource conservation define the entire skill ceiling
Vagrant Story
Weapon crafting, risk management, and affinity stacking are the dominant system
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.