head to head
Neither is simply harder - they are hard in different places. Peggle demands more optimization; Wii Party U demands more reads.

Variance · Pure Chaos
Pachinko-puzzle hybrid where one lucky bounce triggers Ode to Joy.

Variance · Pure Chaos
The Wii U follow-up mixing GamePad tabletop games into the same luck-forward formula.
Peggle leans Variance (Pure Chaos); Wii Party U leans Variance (Pure Chaos).
Wii Party U leans a little harder on execution, though the gap is small.
Peggle
Aiming the launcher is gentle
Wii Party U
GamePad and motion minigames with low ceilings.
Wii Party U leans clearly harder on reads.
Peggle
No opposition whatsoever
Wii Party U
Tabletop bluffing games add light social reads.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Peggle
Bounce physics chaos decides most shots
Wii Party U
Dice and minigame draws rule sessions.
Peggle leans clearly harder on optimization.
Peggle
Angle planning and power choice for setups
Wii Party U
Intentionally shallow systems.
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.