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
A short graphics showcase testing basic shooter execution for twenty minutes.

Execution · Light / Casual
A casual licensed action game testing little beyond light co-op coordination.
Half-Life 2: Lost Coast leans Execution (Practiced Mastery); Harry Potter and the Goblet of Fire leans Execution (Light / Casual).
Half-Life 2: Lost Coast leans a little harder on execution, though the gap is small.
Half-Life 2: Lost Coast
A short stretch of standard Half-Life 2 gunplay
Harry Potter and the Goblet of Fire
Simple co-op spell casting with generous timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2: Lost Coast
A handful of scripted Combine soldiers
Harry Potter and the Goblet of Fire
Enemies are fixed waves, no adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2: Lost Coast
One fixed level with nothing hidden
Harry Potter and the Goblet of Fire
Collectible bean locations are fixed
Harry Potter and the Goblet of Fire leans a little harder on optimization, though the gap is small.
Half-Life 2: Lost Coast
Too brief to develop any systems layer
Harry Potter and the Goblet of Fire
Light card collection and spell upgrade choices
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.