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

Execution · Pure Mechanics
A rally sim whose procedural stages keep variance alive while rewarding clean car control.

Execution · Pure Mechanics
A procedural bullet-hell shooter testing dodging and aim across endless waves.
DiRT 4 leans Execution (Pure Mechanics); Really Big Sky 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.
DiRT 4
Procedural stages still demand consistent throttle and apex discipline
Really Big Sky
Dodging dense bullet hell and aiming decides survival
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
DiRT 4
Time-attack structure has no adaptive opponent
Really Big Sky
Enemies follow scripted patterns, not adapting
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
DiRT 4
Procedurally generated stages prevent full route memorisation
Really Big Sky
Procedural enemy waves and hazards add chaos
DiRT 4 leans a little harder on optimization, though the gap is small.
DiRT 4
Car choice, setup and rally team progression are solvable systems
Really Big Sky
Drill timing and upgrade choices reward planning
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.