head to head
Neither is simply harder - they are hard in different places. Overwatch demands more execution; Yu-Gi-Oh! Duel Links demands more variance.

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

Optimization · Grand Arena
A fast-format digital Yu-Gi-Oh! card game built around ranked PvP and meta decks.
Overwatch leans Execution (Grand Arena); Yu-Gi-Oh! Duel Links leans Optimization (Grand Arena).
Overwatch leans clearly harder on execution.
Overwatch
Hero aim, movement, and ability timing
Yu-Gi-Oh! Duel Links
Tapping cards, no dexterity test
Overwatch leans a little harder on reads, though the gap is small.
Overwatch
Ult tracking, flanks, and baiting human teams
Yu-Gi-Oh! Duel Links
Ranked PvP rewards predicting set cards and bluffs
Yu-Gi-Oh! Duel Links leans clearly harder on variance.
Overwatch
Minor spread and matchmaking noise
Yu-Gi-Oh! Duel Links
Draws and unknown opponent decks dominate
Yu-Gi-Oh! Duel Links leans clearly harder on optimization.
Overwatch
Team comps, ult economy, and positioning theory
Yu-Gi-Oh! Duel Links
Meta deckbuilding and line calculation are the spine
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.