head to head
Neither is simply harder - they are hard in different places. Overwatch demands more optimization; Ring of Elysium demands more variance.

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

Execution · Grand Arena
Gunfight execution and human prediction under randomised loot and storms.
Overwatch leans Execution (Grand Arena); Ring of Elysium 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.
Overwatch
Hero aim, movement, and ability timing
Ring of Elysium
Gunfights are won by aim and movement first
Overwatch leans a little harder on reads, though the gap is small.
Overwatch
Ult tracking, flanks, and baiting human teams
Ring of Elysium
Outguessing human rotations and pushes is constant
Ring of Elysium leans clearly harder on variance.
Overwatch
Minor spread and matchmaking noise
Ring of Elysium
Loot spawns and storm path randomise every match
Overwatch leans clearly harder on optimization.
Overwatch
Team comps, ult economy, and positioning theory
Ring of Elysium
Drop routes and rescue-flight positioning reward planning
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.