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

Execution · Competitive PvP
Team-based WWII infantry shooter about holding and capturing map points.

Execution · Competitive PvP
A boxing game testing punch timing and reading opponent openings.
Day of Defeat: Source leans Execution (Competitive PvP); Real Boxing leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Day of Defeat: Source
Recoil control and snap aim decide most firefights
Real Boxing
Timing punches, blocks and dodges is the core
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Day of Defeat: Source
Human squads shift pushes and holds unpredictably
Real Boxing
Reading opponent feints matters in multiplayer
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Day of Defeat: Source
Known maps, minimal randomness beyond spawn waves
Real Boxing
Little randomness in outcomes
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Day of Defeat: Source
Class loadouts and lane control are quickly mapped
Real Boxing
Stat training and stamina management add depth
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.