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
An arcade FPS that scores you for killing enemies in the most creative ways possible.

Execution · Practiced Mastery
A realistic motorcycle racing sim about precise lines, braking and bike setup.
Bulletstorm leans Execution (Practiced Mastery); MotoGP 21 leans Execution (Practiced Mastery).
MotoGP 21 leans a little harder on execution, though the gap is small.
Bulletstorm
Leash, kick, and shot timing drive skillshot chains
MotoGP 21
Braking points, throttle and racing lines demand precision
MotoGP 21 leans a little harder on reads, though the gap is small.
Bulletstorm
Enemies are scripted fodder for your combos
MotoGP 21
AI scripted; online rivals add light positional prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Bulletstorm
Arenas and spawns are fixed and learnable
MotoGP 21
Tire wear and weather introduce some chance
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Bulletstorm
Maximising skillshot score per arena is a solvable puzzle
MotoGP 21
Setup tuning and race strategy underpin lap times
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.