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 · Practiced Mastery
A modern Gears entry spanning campaign, Horde, Escape, and ranked versus.

Execution · Pure Mechanics
A fast arcade FPS whose skill test is twitch aim plus couch-rival prediction.
Gears 5 leans Execution (Practiced Mastery); TimeSplitters 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.
Gears 5
Movement tech and shotgun duels remain the core test
TimeSplitters
Fast arcade gunplay rewards twitch aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Gears 5
Ranked versus rewards out-thinking human opponents
TimeSplitters
Local multiplayer adds human guessing; bots do not adapt
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Gears 5
Escape and Horde inject some run variance
TimeSplitters
Spawn and pickup timing add mild uncertainty
Gears 5 leans a little harder on optimization, though the gap is small.
Gears 5
Character ultimates and map control are learnable
TimeSplitters
Challenge times and map control are 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.