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 · Competitive PvP
WWI conquest shooter with weighty gunplay.

Execution · Grand Arena
Console-friendly RTS where leader powers, base management, and Blitz card battles test both micro and opponent reading.
Battlefield 1 leans Execution (Competitive PvP); Halo Wars 2 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.
Battlefield 1
Bolt-actions reward steady aim and timing
Halo Wars 2
Leader power activation and Blitz card plays need precise timing
Halo Wars 2 leans a little harder on reads, though the gap is small.
Battlefield 1
Trench flanks and gas plays beat predictions
Halo Wars 2
Opponent leader choice and Blitz deck strategy must be predicted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield 1
Behemoth spawns and chaos shift matches
Halo Wars 2
Blitz card draw and resource crate spawns add moderate uncertainty
Halo Wars 2 leans a little harder on optimization, though the gap is small.
Battlefield 1
Class kits and vehicle counters matter
Halo Wars 2
Leader power cooldown sequencing and base slot assignment are learnable
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.