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
Fan-built ground-up remake of Half-Life with a reimagined Xen.

Execution · Practiced Mastery
A vertical shmup where careful upgrade investment and bullet-threading execution drive progression through increasingly dense stages.
Black Mesa leans Execution (Practiced Mastery); Sky Force Reloaded leans Execution (Practiced Mastery).
Sky Force Reloaded leans a little harder on execution, though the gap is small.
Black Mesa
Classic FPS aim and platforming sequences
Sky Force Reloaded
Precise movement through bullet curtains and timing shields is decisive
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
Sky Force Reloaded
All enemies are scripted; no adaptive opponent
Sky Force Reloaded leans a little harder on variance, though the gap is small.
Black Mesa
Minor enemy placement surprises first run
Sky Force Reloaded
Power-up drops and enemy sub-patterns introduce per-run variation
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Black Mesa
Route, resource, and encounter knowledge
Sky Force Reloaded
Upgrade investment, medal grinding paths, and star usage are optimisable
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.