head to head
Neither is simply harder - they are hard in different places. Coin Master demands more variance; Party Hard demands more execution.

Variance · Pure Chaos
A slot-machine social game where spin RNG drives village building and raids.

Optimization · Systems & Chaos
Isolating targets amid randomised crowds using traps and patience.
Coin Master leans Variance (Pure Chaos); Party Hard leans Optimization (Systems & Chaos).
Party Hard leans clearly harder on execution.
Coin Master
Tapping a spin button needs no skill
Party Hard
Walking and stabbing need timing but little dexterity
Coin Master leans a little harder on reads, though the gap is small.
Coin Master
Raid targets are players but you cannot predict them
Party Hard
Partygoers wander on RNG, not adaptive minds
Coin Master leans clearly harder on variance.
Coin Master
Slot-machine spins drive nearly every reward and raid
Party Hard
Random traps, events and witness behaviour vary each level
Party Hard leans clearly harder on optimization.
Coin Master
Minimal choice in spending coins on the village
Party Hard
Trap usage and isolation tactics converge to known strategies
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.