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
Tests sustained drift-boost execution and track routing under light item chaos.

Execution · Practiced Mastery
The 3DS Mario Kart that added gliders, underwater driving, and kart customisation.
Crash Nitro Kart leans Execution (Practiced Mastery); Mario Kart 7 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.
Crash Nitro Kart
Boost-chaining drift tech demands sustained precise inputs
Mario Kart 7
Drift boosts, gliding, and underwater control
Mario Kart 7 leans a little harder on reads, though the gap is small.
Crash Nitro Kart
Versus humans, item timing adds minor prediction
Mario Kart 7
Online lobbies reward anticipating rivals' items
Mario Kart 7 leans a little harder on variance, though the gap is small.
Crash Nitro Kart
Item boxes shuffle race outcomes somewhat
Mario Kart 7
Item luck shapes every race
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Crash Nitro Kart
Mastering track lines and boost routes rewards study
Mario Kart 7
Kart customisation and track-specific routes
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.