head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Execution · Twitch Chaos
Kart racing execution moderated by item randomness and learnable track routes.

Execution · Practiced Mastery
A twin-stick action shooter testing aim and crowd control against scripted hordes.
Sonic & All-Stars Racing Transformed leans Execution (Twitch Chaos); Warhammer 40,000: Kill Team 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.
Sonic & All-Stars Racing Transformed
Drift timing and transforming vehicle control reward practice
Warhammer 40,000: Kill Team
Twin-stick aiming and dodging waves is the action core
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Sonic & All-Stars Racing Transformed
Human racers add light positional mind games
Warhammer 40,000: Kill Team
Enemy hordes are scripted, not adapting minds
Sonic & All-Stars Racing Transformed leans a little harder on variance, though the gap is small.
Sonic & All-Stars Racing Transformed
Item rolls regularly upend race positions
Warhammer 40,000: Kill Team
Enemy spawns and drops add bounded randomness
Warhammer 40,000: Kill Team leans a little harder on optimization, though the gap is small.
Sonic & All-Stars Racing Transformed
Track shortcuts and drift-boost routes are learnable
Warhammer 40,000: Kill Team
Class abilities and upgrade paths reward planning
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.