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

Optimization · Practiced Mastery
A comedic first-person exploration romp cataloguing a candy-coloured alien planet.
Assassin's Creed II leans Optimization (Practiced Mastery); Journey to the Savage Planet leans Optimization (Practiced Mastery).
Assassin's Creed II leans a little harder on execution, though the gap is small.
Assassin's Creed II
Counter-heavy combat stays forgiving
Journey to the Savage Planet
Light shooting and platforming, forgiving
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
Journey to the Savage Planet
Creature AI is simple and scripted
Journey to the Savage Planet leans a little harder on variance, though the gap is small.
Assassin's Creed II
Fixed world and missions
Journey to the Savage Planet
Some unknown creature behaviours on first contact
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed II
Villa economy and route planning, lightly
Journey to the Savage Planet
Upgrade routing and scan-everything exploration
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.