head to head
Neither is simply harder - they are hard in different places. DOOM (2016) demands more optimization; Tennis World Tour 2 demands more reads.

Execution · Pure Mechanics
Push-forward arena FPS where movement and aim are the whole game.

Execution · Pure Mechanics
A tennis simulation testing shot execution and reading opponent positioning.
DOOM (2016) leans Execution (Pure Mechanics); Tennis World Tour 2 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.
DOOM (2016)
Aim, movement, glory-kill timing all peak.
Tennis World Tour 2
shot timing, positioning, and precision control
Tennis World Tour 2 leans clearly harder on reads.
DOOM (2016)
Demons scripted attack patterns.
Tennis World Tour 2
human opponents adapt shot placement
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
DOOM (2016)
Minimal encounter randomness.
Tennis World Tour 2
minor ball-physics unpredictability
DOOM (2016) leans clearly harder on optimization.
DOOM (2016)
Rune and weapon mod picks meaningful.
Tennis World Tour 2
minor player/equipment choice
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.