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.

Execution · Practiced Mastery
Fan-built ground-up remake of Half-Life with a reimagined Xen.

Execution · Practiced Mastery
A gritty African shooter where systemic chaos roughens every firefight.
Black Mesa leans Execution (Practiced Mastery); Far Cry 2 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.
Black Mesa
Classic FPS aim and platforming sequences
Far Cry 2
Gunplay with degrading, jamming weapons
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Black Mesa
Marines and aliens follow set scripts
Far Cry 2
Mercenary AI is mappable
Far Cry 2 leans a little harder on variance, though the gap is small.
Black Mesa
Minor enemy placement surprises first run
Far Cry 2
Malaria, jams, and fire spread inject chaos
Black Mesa leans a little harder on optimization, though the gap is small.
Black Mesa
Route, resource, and encounter knowledge
Far Cry 2
Loadout and route planning across hostile terrain
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.