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

Execution · Pure Mechanics
Reflex-driven point-to-point racing through heavily scripted setpieces.

Execution · Pure Mechanics
A runner platformer where you rotate gravity around endless tunnels of crumbling tiles.
Need for Speed: The Run leans Execution (Pure Mechanics); Run 3 leans Execution (Pure Mechanics).
Run 3 leans a little harder on execution, though the gap is small.
Need for Speed: The Run
Reaction driving through traffic and setpieces is the test
Run 3
Fast gravity-rotating platforming is a pure hands test.
Need for Speed: The Run leans a little harder on reads, though the gap is small.
Need for Speed: The Run
Rivals rubber-band on scripts, nothing to out-think
Run 3
No opponents in the tunnels.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed: The Run
Scripted events surprise once, then are known
Run 3
Infinite mode tiles randomize lightly.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed: The Run
Checkpoint routes and car choice are quickly solved
Run 3
Character choice and route lines help.
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.