head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
Straightforward cover-shooting aim against fully scripted enemy waves.

Execution · Practiced Mastery
An open-world crime game where combat combos and driving skill carry the action.
Army of Two: The Devil's Cartel leans Execution (Practiced Mastery); Sleeping Dogs leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Army of Two: The Devil's Cartel
Cover shooting rewards decent aim, nothing more
Sleeping Dogs
brawling and driving need timing/aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Army of Two: The Devil's Cartel
Cartel enemies follow scripted cover AI
Sleeping Dogs
scripted enemy AI, no adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Army of Two: The Devil's Cartel
Encounters replay identically
Sleeping Dogs
minor loot and traffic randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Army of Two: The Devil's Cartel
Weapon customization adds light loadout math
Sleeping Dogs
upgrade paths and mission routes solvable
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.