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
The acclaimed cinematic action sequel famous for its train and collapsing-building set pieces.

Execution · Practiced Mastery
The first cinematic treasure-hunting adventure of cover shootouts and cliffside climbing.
Uncharted 2: Among Thieves leans Execution (Practiced Mastery); Uncharted: Drake's Fortune 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.
Uncharted 2: Among Thieves
Set-piece gunplay and traversal under fire
Uncharted: Drake's Fortune
Cover gunfights and climbing timing
Uncharted 2: Among Thieves leans a little harder on reads, though the gap is small.
Uncharted 2: Among Thieves
Campaign AI is scripted; MP adds a trace
Uncharted: Drake's Fortune
Mercenary AI is scripted waves
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Uncharted 2: Among Thieves
Authored spectacle, nothing hidden
Uncharted: Drake's Fortune
Fully authored set pieces
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Uncharted 2: Among Thieves
Encounter knowledge trivializes replays
Uncharted: Drake's Fortune
Encounter layouts and weapon choices are learnable
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.