head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Systems & Chaos
Medieval dynasty sim with chaotic event-driven stories.

Variance · Systems & Chaos
Streamlined card battles where deck construction fights the coin flips.
Crusader Kings II leans Optimization (Systems & Chaos); Pokémon Trading Card Game Pocket leans Variance (Systems & Chaos).
Crusader Kings II leans a little harder on execution, though the gap is small.
Crusader Kings II
pausable, no reflex
Pokémon Trading Card Game Pocket
Tapping cards takes no skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Crusader Kings II
AI characters scripted not adaptive
Pokémon Trading Card Game Pocket
Human opponents exist but the simplified format limits bluffing depth
Pokémon Trading Card Game Pocket leans a little harder on variance, though the gap is small.
Crusader Kings II
dynastic events, traits, intrigue
Pokémon Trading Card Game Pocket
Coin flips, draws and pack pulls dominate single games
Crusader Kings II leans a little harder on optimization, though the gap is small.
Crusader Kings II
succession, marriages, claims plannable
Pokémon Trading Card Game Pocket
Deckbuilding around a small card pool is quickly solvable
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.