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
Arcade flight and shooting precision over fixed missions with learnable score routes.

Execution · Practiced Mastery
The acclaimed cinematic action sequel famous for its train and collapsing-building set pieces.
Star Fox: Assault leans Execution (Practiced Mastery); Uncharted 2: Among Thieves leans Execution (Practiced Mastery).
Star Fox: Assault leans a little harder on execution, though the gap is small.
Star Fox: Assault
Arwing dogfights and on-foot aim demand steady twitch play
Uncharted 2: Among Thieves
Set-piece gunplay and traversal under fire
Star Fox: Assault leans a little harder on reads, though the gap is small.
Star Fox: Assault
Versus mode adds light human prediction; campaign is scripted
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.
Star Fox: Assault
Missions play out identically each run
Uncharted 2: Among Thieves
Authored spectacle, nothing hidden
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Star Fox: Assault
Scoring routes and boss patterns are learnable
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.