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
An open-world winter sports game testing trick execution and downhill control.

Execution · Pure Mechanics
Motion-controlled tennis, bowling, golf, baseball and boxing built around simple swing gestures.
Snow leans Execution (Pure Mechanics); Wii Sports leans Execution (Pure Mechanics).
Snow leans a little harder on execution, though the gap is small.
Snow
Controlling tricks, balance and landings is the lead skill
Wii Sports
Motion swing timing and accuracy decide every event
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Snow
Open-world solo play with no adaptive opponent
Wii Sports
Casual local opponents add light mind games
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Snow
Terrain is fixed; minor randomness in events
Wii Sports
Minor physics wobble and CPU behaviour randomness
Snow leans a little harder on optimization, though the gap is small.
Snow
Line choice and gear tuning reward planning for events
Wii Sports
Simple technique tricks like bowling spin are learnable
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.