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 · Practiced Mastery
The 3DS Mario Kart that added gliders, underwater driving, and kart customisation.

Execution · Practiced Mastery
A falling-block puzzle testing fast coin-combining under accelerating speed.
Mario Kart 7 leans Execution (Practiced Mastery); Money Puzzle Exchanger leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Kart 7
Drift boosts, gliding, and underwater control
Money Puzzle Exchanger
Fast coin manipulation under accelerating speed
Mario Kart 7 leans a little harder on reads, though the gap is small.
Mario Kart 7
Online lobbies reward anticipating rivals' items
Money Puzzle Exchanger
Versus play adds light pressure, no deep modeling
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Kart 7
Item luck shapes every race
Money Puzzle Exchanger
Falling coin order is bounded randomness
Money Puzzle Exchanger leans a little harder on optimization, though the gap is small.
Mario Kart 7
Kart customisation and track-specific routes
Money Puzzle Exchanger
Chaining exchanges optimally is the scoring core
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.