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 · Practiced Mastery
Ezio's Renaissance revenge tale of parkour, assassination, and villa-building across Italy.

Execution · Practiced Mastery
An explosion-first open-world sandbox starring an infinite-ammo wingsuit rebel.
Assassin's Creed II leans Optimization (Practiced Mastery); Just Cause 3 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed II
Counter-heavy combat stays forgiving
Just Cause 3
Wingsuit threading and tether stunts take practice
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed II
Guards follow scripts
Just Cause 3
Scripted military AI
Just Cause 3 leans a little harder on variance, though the gap is small.
Assassin's Creed II
Fixed world and missions
Just Cause 3
Emergent physics chaos, no real hidden info
Assassin's Creed II leans a little harder on optimization, though the gap is small.
Assassin's Creed II
Villa economy and route planning, lightly
Just Cause 3
Base liberation order and gear mod unlocks
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.