head to head
Neither is simply harder - they are hard in different places. Marvel Snap demands more optimization; Project Winter demands more execution.

Reads · Grand Arena
A fast card game where the snap mechanic makes reads central.

Reads · Bluff & Deduction
Survivors repair an escape route in a blizzard while hidden traitors sabotage them.
Marvel Snap leans Reads (Grand Arena); Project Winter leans Reads (Bluff & Deduction).
Project Winter leans clearly harder on execution.
Marvel Snap
No execution component
Project Winter
Light combat and gathering; hands rarely decide outcomes.
Project Winter leans a little harder on reads, though the gap is small.
Marvel Snap
Snap/retreat decisions are pure opponent psychology
Project Winter
Spotting traitor sabotage means modeling shifting human deception.
Marvel Snap leans a little harder on variance, though the gap is small.
Marvel Snap
Hidden locations and draws drive swings
Project Winter
Hidden traitor identities and random map resources cloud information.
Marvel Snap leans clearly harder on optimization.
Marvel Snap
Deck construction and curve still matter
Project Winter
Efficient task routing and escape objectives are learnable.
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.