head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Practiced Mastery
An endless-runner shooter testing steering and aim against zombie crowds.

Execution · Practiced Mastery
Loot-driven co-op heist shooter where builds and route knowledge make perfect crimes.
Into the Dead 2 leans Execution (Practiced Mastery); Payday 2 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.
Into the Dead 2
Steering and aiming while auto-running drives survival
Payday 2
Sustained gunfights and stealth execution under pressure
Into the Dead 2 leans a little harder on reads, though the gap is small.
Into the Dead 2
Zombies shamble on scripts, no prediction
Payday 2
Cops and guards follow spawn scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Into the Dead 2
Spawn placement and pickup drops vary each run
Payday 2
Random vault locations, guard patrols, and escrow rolls
Payday 2 leans a little harder on optimization, though the gap is small.
Into the Dead 2
Weapon loadout and upgrade choices reward planning
Payday 2
Skill builds and stealth route planning per heist
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.