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
Open-world Stone Age action game about hunting and conquering tribal outposts with tamed beasts.

Execution · Practiced Mastery
Claustrophobic post-apocalyptic shooter where bullets double as currency.
Far Cry Primal leans Execution (Practiced Mastery); Metro 2033 leans Execution (Practiced Mastery).
Far Cry Primal leans a little harder on execution, though the gap is small.
Far Cry Primal
Bow aim, melee timing, beast control under pressure
Metro 2033
scarce-ammo gunfights punish sloppy aim
Far Cry Primal leans a little harder on reads, though the gap is small.
Far Cry Primal
Scripted tribal AI never models the player
Metro 2033
mutants and bandits follow scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Far Cry Primal
Wildlife encounters and patrol spawns are random
Metro 2033
hidden moral points and supplies first run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Far Cry Primal
Outpost routes, crafting economy, beast taming order
Metro 2033
ammo-as-currency economy and stealth routing
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.