head to head
Neither is simply harder - they are hard in different places. Overwatch demands more optimization; Z1 Battle Royale demands more variance.

Execution · Grand Arena
Team hero shooter blending FPS mechanics with ability economy mind games.

Execution · Grand Arena
An early battle royale shooter where dozens of players loot, drive, and shoot to be the last one standing.
Overwatch leans Execution (Grand Arena); Z1 Battle Royale leans Execution (Grand Arena).
Overwatch leans a little harder on execution, though the gap is small.
Overwatch
Hero aim, movement, and ability timing
Z1 Battle Royale
Gunplay, bullet drop, and car control under pressure
Overwatch leans a little harder on reads, though the gap is small.
Overwatch
Ult tracking, flanks, and baiting human teams
Z1 Battle Royale
Human opponents rotate, bait, and adapt to you
Z1 Battle Royale leans clearly harder on variance.
Overwatch
Minor spread and matchmaking noise
Z1 Battle Royale
Loot spawns, drop locations, and gas circles
Overwatch leans clearly harder on optimization.
Overwatch
Team comps, ult economy, and positioning theory
Z1 Battle Royale
Loadout and rotation strategy is a thinner layer
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.