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.

Variance · Systems & Chaos
A tense one-on-one Russian roulette duel with a shotgun.

Variance · Systems & Chaos
Streamlined card battles where deck construction fights the coin flips.
Buckshot Roulette leans Variance (Systems & Chaos); Pokémon Trading Card Game Pocket leans Variance (Systems & Chaos).
Buckshot Roulette leans a little harder on execution, though the gap is small.
Buckshot Roulette
Trivial click inputs.
Pokémon Trading Card Game Pocket
Tapping cards takes no skill
Buckshot Roulette leans a little harder on reads, though the gap is small.
Buckshot Roulette
Dealer has minor adaptive bluff tells.
Pokémon Trading Card Game Pocket
Human opponents exist but the simplified format limits bluffing depth
Buckshot Roulette leans a little harder on variance, though the gap is small.
Buckshot Roulette
Shell order is hidden and random.
Pokémon Trading Card Game Pocket
Coin flips, draws and pack pulls dominate single games
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Buckshot Roulette
Probability tracking and item use reward optimization.
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.