head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
A grittier crime story where weighty driving and gunplay carry the experience.

Execution · Practiced Mastery
A grimy camcorder-styled shooter dragging two criminals across Shanghai.
Grand Theft Auto IV leans Execution (Practiced Mastery); Kane & Lynch 2: Dog Days 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.
Grand Theft Auto IV
Heavier driving and cover shooting reward control.
Kane & Lynch 2: Dog Days
Scrappy close-range gunfights demand steady aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto IV
Scripted AI, no adaptive opponent modeling.
Kane & Lynch 2: Dog Days
Multiplayer betrayal modes add slight human reads
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto IV
Minor mission variance.
Kane & Lynch 2: Dog Days
Fixed encounters with chaotic feel
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto IV
Mission routing and weapon picks learnable.
Kane & Lynch 2: Dog Days
Cover routes and arsenal knowledge
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.