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.

Execution · Practiced Mastery
The template Far Cry: outposts, predators, and a tropical sandbox.

Execution · Practiced Mastery
An explosion-first open-world sandbox starring an infinite-ammo wingsuit rebel.
Far Cry 3 leans Execution (Practiced Mastery); Just Cause 3 leans Execution (Practiced Mastery).
Far Cry 3 leans a little harder on execution, though the gap is small.
Far Cry 3
Shooting and stealth fundamentals matter.
Just Cause 3
Wingsuit threading and tether stunts take practice
Far Cry 3 leans a little harder on reads, though the gap is small.
Far Cry 3
Pirate AI uses fixed alert patterns.
Just Cause 3
Scripted military AI
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Far Cry 3
Wildlife and outpost spawns randomized.
Just Cause 3
Emergent physics chaos, no real hidden info
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Far Cry 3
Skill trees and weapon mods quickly mastered.
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.