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 · Pure Mechanics
A joke arcade game testing only reaction speed at matching the correct dad.
Half-Life 2: Lost Coast leans Execution (Practiced Mastery); Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad? leans Execution (Pure Mechanics).
Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad? 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
Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad?
Fast dad-matching under a timer is a pure reaction check
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
Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad?
No opponent - just accelerating sorting
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
Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad?
Dad spawn order is random but meaningless
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2: Lost Coast
Too brief to develop any systems layer
Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad?
Nothing to solve beyond pattern recognition speed
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.
full breakdown
Half-Life 2: Lost Coast →
full breakdown
Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad? →