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
An open-world pirate adventure where upgrading the Jackdaw matters more than the blade.

Optimization · Practiced Mastery
Expanded machine combat with broader build systems and traversal tools.
Assassin's Creed IV: Black Flag leans Optimization (Practiced Mastery); Horizon Forbidden West leans Optimization (Practiced Mastery).
Horizon Forbidden West leans a little harder on execution, though the gap is small.
Assassin's Creed IV: Black Flag
Naval broadsides and boarding need modest timing
Horizon Forbidden West
Faster combat with valor surges and aiming.
Assassin's Creed IV: Black Flag leans a little harder on reads, though the gap is small.
Assassin's Creed IV: Black Flag
Multiplayer deception mode; campaign is scripted
Horizon Forbidden West
Machines remain scripted, not adaptive.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed IV: Black Flag
Weather, convoys, and hunting spawns
Horizon Forbidden West
Loot rolls and patrol RNG light.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed IV: Black Flag
Ship upgrades and fleet economy drive progress
Horizon Forbidden West
Deeper gear, weapon techniques, machine weaknesses.
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.