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 · Grand Arena
An extraction shooter where scavengers dodge killer machines and rival squads for loot.

Execution · Grand Arena
Battle royale survival blending aim, rotation planning, and heavy circle-and-loot RNG.
ARC Raiders leans Execution (Grand Arena); PUBG Mobile leans Execution (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
ARC Raiders
Gunplay and movement under machine fire
PUBG Mobile
Touchscreen aim and recoil control set the ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
ARC Raiders
Rival squads ambush, bait, and adapt
PUBG Mobile
Outguessing rotations and third-party timing of human squads
PUBG Mobile leans a little harder on variance, though the gap is small.
ARC Raiders
Loot spawns and unknown player positions
PUBG Mobile
Circle placement, loot and drop locations dominate single matches
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
ARC Raiders
Loadout economy and map knowledge compound
PUBG Mobile
Zone rotation theory and loadout priorities are well mapped
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.