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
An endless-runner shooter testing steering and aim against zombie crowds.

Execution · Twitch Chaos
Kart racing execution moderated by item randomness and learnable track routes.
Into the Dead 2 leans Execution (Practiced Mastery); Sonic & All-Stars Racing Transformed leans Execution (Twitch Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Into the Dead 2
Steering and aiming while auto-running drives survival
Sonic & All-Stars Racing Transformed
Drift timing and transforming vehicle control reward practice
Sonic & All-Stars Racing Transformed leans a little harder on reads, though the gap is small.
Into the Dead 2
Zombies shamble on scripts, no prediction
Sonic & All-Stars Racing Transformed
Human racers add light positional mind games
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Into the Dead 2
Spawn placement and pickup drops vary each run
Sonic & All-Stars Racing Transformed
Item rolls regularly upend race positions
Into the Dead 2 leans a little harder on optimization, though the gap is small.
Into the Dead 2
Weapon loadout and upgrade choices reward planning
Sonic & All-Stars Racing Transformed
Track shortcuts and drift-boost routes 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.