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 · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Execution · Pure Mechanics
Classic arcade aim-and-timing against escalating scripted waves.
Half-Life 2 leans Execution (Pure Mechanics); Pooyan leans Execution (Pure Mechanics).
Pooyan leans a little harder on execution, though the gap is small.
Half-Life 2
Gravity gun and shooting demand precision.
Pooyan
Shooting wolves on balloons is pure timing and aim
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Pooyan
Wolves follow simple fixed behaviours
Pooyan leans a little harder on variance, though the gap is small.
Half-Life 2
Almost no randomness.
Pooyan
Wave spawns vary slightly but are quickly learnt
Pooyan leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Pooyan
Scoring patterns and wave order can be memorised
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.