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
Mid-demand 3D platforming execution across fixed gravity puzzles.

Execution · Practiced Mastery
The acclaimed cinematic action sequel famous for its train and collapsing-building set pieces.
Super Mario Galaxy leans Execution (Practiced Mastery); Uncharted 2: Among Thieves leans Execution (Practiced Mastery).
Super Mario Galaxy leans a little harder on execution, though the gap is small.
Super Mario Galaxy
Gravity-bending jumps need timing, though forgiving by Mario standards
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.
Super Mario Galaxy
Bosses repeat fixed patterns - nothing adapts
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.
Super Mario Galaxy
Galaxies are scripted; surprises evaporate after one visit
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.
Super Mario Galaxy
Star routes and comet challenges reward learned solutions
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.