head to head
Hearthstone asks more than Political Animals, and the gap is variance.

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

Optimization · Mind & Math
An election strategy game about allocating campaign resources against rivals.
Hearthstone leans Variance (Grand Arena); Political Animals leans Optimization (Mind & Math).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Hearthstone
Clicks only, no mechanical skill
Political Animals
Menu-driven turns with no twitch element
Hearthstone leans a little harder on reads, though the gap is small.
Hearthstone
Human opponents bluff and adapt mid-match
Political Animals
Multiplayer lets you anticipate rival candidates' moves
Hearthstone leans clearly harder on variance.
Hearthstone
Draw RNG and discover effects swing games
Political Animals
Election events and outcomes carry randomness
Hearthstone leans a little harder on optimization, though the gap is small.
Hearthstone
Deckbuilding, mulligans, and mana curves matter
Political Animals
Allocating campaign resources optimally wins elections
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.