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
Hardcore racing sim where execution is everything.

Execution · Practiced Mastery
An aggressive soulslike about punishing fixed boss patterns with tight dodging.
Assetto Corsa leans Execution (Practiced Mastery); Bloodborne leans Execution (Practiced Mastery).
Assetto Corsa leans a little harder on execution, though the gap is small.
Assetto Corsa
Demanding wheel control, braking, throttle precision
Bloodborne
Aggressive dodges and rally timing demand sharp hands.
Assetto Corsa leans a little harder on reads, though the gap is small.
Assetto Corsa
Light online wheel-to-wheel reads
Bloodborne
Bosses follow fixed movesets; no model of you.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Assetto Corsa
Tire and track temp variance
Bloodborne
Chalice dungeon layouts and drops add some randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Assetto Corsa
Setup tuning, car-track combo mastery
Bloodborne
Builds, weapons, and boss patterns are studyable and solvable.
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.