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

Execution · Practiced Mastery
Parkour-fueled zombie survival where movement skill carries every encounter.

Execution · Practiced Mastery
A modern arcade dungeon crawler where surviving the horde comes down to crisp dodging and aim.
Dying Light 2 Stay Human leans Execution (Practiced Mastery); Gauntlet: Slayer Edition 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.
Dying Light 2 Stay Human
Parkour and melee timing central.
Gauntlet: Slayer Edition
Dodging hordes and aiming skill shots is the test.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dying Light 2 Stay Human
Infected and humans scripted, predictable.
Gauntlet: Slayer Edition
Light food-stealing mindgames between co-op partners only.
Gauntlet: Slayer Edition leans a little harder on variance, though the gap is small.
Dying Light 2 Stay Human
Night spawns and loot vary.
Gauntlet: Slayer Edition
Spawner placement and pickups vary modestly.
Dying Light 2 Stay Human leans a little harder on optimization, though the gap is small.
Dying Light 2 Stay Human
Skill trees, weapon mods, route choices solvable.
Gauntlet: Slayer Edition
Relic and class choices give a small solvable edge.
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.