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 · Competitive PvP
An arcade soccer novelty testing timing around special-shot chaos.

Execution · Pure Mechanics
Island-themed collection of twelve motion-controlled sports showcasing the Wii MotionPlus accessory.
Mega Man Soccer leans Execution (Competitive PvP); Wii Sports Resort leans Execution (Pure Mechanics).
Wii Sports Resort leans a little harder on execution, though the gap is small.
Mega Man Soccer
Sluggish controls still reward shot timing and positioning
Wii Sports Resort
MotionPlus precision in swordplay, archery and bowling
Mega Man Soccer leans a little harder on reads, though the gap is small.
Mega Man Soccer
Human opponents add light positional guessing
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.
Mega Man Soccer
Special-shot chaos adds some randomness
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.
Mega Man Soccer
Team composition and special-shot management are shallow systems
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.