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

Execution · Competitive PvP
A shallow novelty wrestler testing little beyond basic timing and weapon grabs.

Execution · Pure Mechanics
Nine pointer-driven minigames bundled with a Wii Remote, from duck-hunt shooting to table tennis.
Celebrity Deathmatch leans Execution (Competitive PvP); Wii Play leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Celebrity Deathmatch
Button timing wins matches but the ceiling is low
Wii Play
Pointer aim and timing carry shooting and ping-pong games
Celebrity Deathmatch leans a little harder on reads, though the gap is small.
Celebrity Deathmatch
A couch opponent can be conditioned, shallowly
Wii Play
Two-player duels add slight mutual prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Celebrity Deathmatch
Random weapon drops shake up the ring
Wii Play
Find Mii crowds and target spawns randomise lightly
Celebrity Deathmatch leans a little harder on optimization, though the gap is small.
Celebrity Deathmatch
Learning each celebrity's finisher exhausts the depth fast
Wii Play
Minigames are too shallow to deeply optimise
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.