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 · Practiced Mastery
Balancing a physics vehicle over terrain while upgrade math sets your ceiling.

Execution · Practiced Mastery
Arcade car control at speed over memorised tracks with scripted police pressure.
Hill Climb Racing 2 leans Execution (Practiced Mastery); Need for Speed: Hot Pursuit 2 leans Execution (Practiced Mastery).
Need for Speed: Hot Pursuit 2 leans a little harder on execution, though the gap is small.
Hill Climb Racing 2
Throttle-and-brake balance over physics terrain decides every run
Need for Speed: Hot Pursuit 2
High-speed cornering and traffic dodging are the whole test
Need for Speed: Hot Pursuit 2 leans a little harder on reads, though the gap is small.
Hill Climb Racing 2
Async opponents are ghosts, nothing to predict live
Need for Speed: Hot Pursuit 2
AI racers and cops follow rubber-band scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Hill Climb Racing 2
Procedural terrain segments add mild run-to-run noise
Need for Speed: Hot Pursuit 2
Cop spawns and traffic add mild run-to-run noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Hill Climb Racing 2
Vehicle choice, tuning and upgrade paths set the ceiling
Need for Speed: Hot Pursuit 2
Track knowledge and racing lines are learnable and fixed
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.