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

Execution · Twitch Chaos
An endless action game riding a dragon that burrows and leaps through terrain.

Execution · Practiced Mastery
A grittier crime story where weighty driving and gunplay carry the experience.
Dragon Hills leans Execution (Twitch Chaos); Grand Theft Auto IV leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Hills
timing jumps and attacks while riding dragon
Grand Theft Auto IV
Heavier driving and cover shooting reward control.
Grand Theft Auto IV leans a little harder on reads, though the gap is small.
Dragon Hills
no opponent, solo endless action
Grand Theft Auto IV
Scripted AI, no adaptive opponent modeling.
Dragon Hills leans a little harder on variance, though the gap is small.
Dragon Hills
random terrain and enemy generation
Grand Theft Auto IV
Minor mission variance.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Hills
minor upgrade optimization across runs
Grand Theft Auto IV
Mission routing and weapon picks learnable.
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.