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

Variance · Grand Arena
A digital card game balancing opponent reads against draw variance.

Reads · Bluff & Deduction
Survivors repair an escape route in a blizzard while hidden traitors sabotage them.
Hearthstone leans Variance (Grand Arena); Project Winter leans Reads (Bluff & Deduction).
Project Winter leans clearly harder on execution.
Hearthstone
Clicks only, no mechanical skill
Project Winter
Light combat and gathering; hands rarely decide outcomes.
Project Winter leans clearly harder on reads.
Hearthstone
Human opponents bluff and adapt mid-match
Project Winter
Spotting traitor sabotage means modeling shifting human deception.
Hearthstone leans a little harder on variance, though the gap is small.
Hearthstone
Draw RNG and discover effects swing games
Project Winter
Hidden traitor identities and random map resources cloud information.
Hearthstone leans clearly harder on optimization.
Hearthstone
Deckbuilding, mulligans, and mana curves 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.