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 · Twitch Chaos
A kart racer with random items and drift timing on themed circuits.

Execution · Practiced Mastery
Co-op FPS about four masked crooks holding out through scripted heist assaults.
Cartoon Network Racing leans Execution (Twitch Chaos); Payday: The Heist 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.
Cartoon Network Racing
Steering, drifting and item timing decide races
Payday: The Heist
Holding off assault waves takes solid gunplay
Cartoon Network Racing leans a little harder on reads, though the gap is small.
Cartoon Network Racing
AI racers scripted, no adaptive prediction
Payday: The Heist
Police waves are scripted spawns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Cartoon Network Racing
Random item pickups swing race outcomes
Payday: The Heist
Drill failures and objective locations shuffle
Payday: The Heist leans a little harder on optimization, though the gap is small.
Cartoon Network Racing
Shortcuts and item use reward track knowledge
Payday: The Heist
Crew positioning and objective sequencing per heist
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.