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.

Optimization · Grand Arena
A deep card game blending opponent reads, draw variance, and sequencing.

Optimization · Grand Arena
A fast-format digital Yu-Gi-Oh! card game built around ranked PvP and meta decks.
Magic: The Gathering Arena leans Optimization (Grand Arena); Yu-Gi-Oh! Duel Links leans Optimization (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Magic: The Gathering Arena
Pure clicks, no mechanical skill
Yu-Gi-Oh! Duel Links
Tapping cards, no dexterity test
Magic: The Gathering Arena leans a little harder on reads, though the gap is small.
Magic: The Gathering Arena
Bluffing instants and combat tricks against humans
Yu-Gi-Oh! Duel Links
Ranked PvP rewards predicting set cards and bluffs
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Magic: The Gathering Arena
Mana screw and topdecks remain decisive
Yu-Gi-Oh! Duel Links
Draws and unknown opponent decks dominate
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Magic: The Gathering Arena
Deepest sequencing, deckbuilding, and stack puzzles
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.