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 open-world arcade racer across Australia where car control and tuning carry every event.

Execution · Pure Mechanics
Reflex-driven point-to-point racing through heavily scripted setpieces.
Forza Horizon 3 leans Execution (Practiced Mastery); Need for Speed: The Run leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 3
Car control and racing lines at speed
Need for Speed: The Run
Reaction driving through traffic and setpieces is the test
Forza Horizon 3 leans a little harder on reads, though the gap is small.
Forza Horizon 3
Drivatars mimic but don't truly adapt
Need for Speed: The Run
Rivals rubber-band on scripts, nothing to out-think
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 3
Minor traffic and event variation
Need for Speed: The Run
Scripted events surprise once, then are known
Forza Horizon 3 leans a little harder on optimization, though the gap is small.
Forza Horizon 3
Tuning, car choice, and route knowledge
Need for Speed: The Run
Checkpoint routes and car choice are quickly solved
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.