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.

Execution · Pure Mechanics
A rail shooter testing aim and reflexes through scripted space battles.

Execution · Pure Mechanics
Island-themed collection of twelve motion-controlled sports showcasing the Wii MotionPlus accessory.
Star Wars Arcade leans Execution (Pure Mechanics); Wii Sports Resort leans Execution (Pure Mechanics).
Star Wars Arcade leans a little harder on execution, though the gap is small.
Star Wars Arcade
Aiming and dodging in rail combat decides survival
Wii Sports Resort
MotionPlus precision in swordplay, archery and bowling
Wii Sports Resort leans a little harder on reads, though the gap is small.
Star Wars Arcade
Enemy ships follow scripted attack patterns
Wii Sports Resort
Local versus duels involve mild feinting
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Star Wars Arcade
Minor variation in enemy approaches
Wii Sports Resort
Slight physics and CPU pattern randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Star Wars Arcade
Memorizing waves and conserving shields helps
Wii Sports Resort
Each event has small learnable technique optima
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.