head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Practiced Mastery
A short promotional sidescroller testing basic 2D aim and platforming.

Execution · Practiced Mastery
The acclaimed cinematic action sequel famous for its train and collapsing-building set pieces.
Codename: Gordon leans Execution (Practiced Mastery); Uncharted 2: Among Thieves 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.
Codename: Gordon
2D mouse-aimed shooting and platforming carry the short campaign
Uncharted 2: Among Thieves
Set-piece gunplay and traversal under fire
Uncharted 2: Among Thieves leans a little harder on reads, though the gap is small.
Codename: Gordon
Combine soldiers run simple fixed AI
Uncharted 2: Among Thieves
Campaign AI is scripted; MP adds a trace
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Codename: Gordon
Levels are short, scripted and static
Uncharted 2: Among Thieves
Authored spectacle, nothing hidden
Uncharted 2: Among Thieves leans a little harder on optimization, though the gap is small.
Codename: Gordon
Little to solve beyond basic ammo and route awareness
Uncharted 2: Among Thieves
Encounter knowledge trivializes replays
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.