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
Landmark scripted FPS following Gordon Freeman through the Black Mesa disaster.

Optimization · Practiced Mastery
A cinematic WWII console shooter famous for its D-Day opening.
Half-Life leans Execution (Practiced Mastery); Medal of Honor: Frontline leans Optimization (Practiced Mastery).
Half-Life leans a little harder on execution, though the gap is small.
Half-Life
Combat aim and infamous platforming sections
Medal of Honor: Frontline
Console gunplay through cinematic set-pieces
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life
Marines flank by script, not by modelling you
Medal of Honor: Frontline
Scripted soldiers never adapt
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life
Set pieces surprise only on first run
Medal of Honor: Frontline
Set-piece surprises fade after one run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life
Resource routing and encounter knowledge for speedruns
Medal of Honor: Frontline
Memorising spawns and routes trivialises missions
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.