head to head
Neither is simply harder - they are hard in different places. Gwent: The Witcher Card Game demands more optimization; Marvel Snap demands more variance.

Reads · Mind & Math
A bluffing-heavy card game where reading your opponent across three rounds outweighs raw card power.

Reads · Grand Arena
A fast card game where the snap mechanic makes reads central.
Gwent: The Witcher Card Game leans Reads (Mind & Math); Marvel Snap leans Reads (Grand Arena).
Gwent: The Witcher Card Game leans a little harder on execution, though the gap is small.
Gwent: The Witcher Card Game
No timing involved; purely strategic card placement
Marvel Snap
No execution component
Gwent: The Witcher Card Game leans a little harder on reads, though the gap is small.
Gwent: The Witcher Card Game
Two-out-of-three rounds create meta-game bluffing and baiting
Marvel Snap
Snap/retreat decisions are pure opponent psychology
Marvel Snap leans clearly harder on variance.
Gwent: The Witcher Card Game
Card draws and hidden hand matter but deck is known
Marvel Snap
Hidden locations and draws drive swings
Gwent: The Witcher Card Game leans clearly harder on optimization.
Gwent: The Witcher Card Game
Row control and point denial strategies are analytically solvable
Marvel Snap
Deck construction and curve still matter
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.