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 · Pure Mechanics
WWII shooter remembered for its Omaha Beach landing and tense rifle duels.

Execution · Pure Mechanics
A fast arcade FPS whose skill test is twitch aim plus couch-rival prediction.
Medal of Honor: Allied Assault leans Execution (Pure Mechanics); 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.
Medal of Honor: Allied Assault
classic FPS aim, leaning, and sniping
TimeSplitters
Fast arcade gunplay rewards twitch aim
TimeSplitters leans a little harder on reads, though the gap is small.
Medal of Honor: Allied Assault
historic multiplayer scene rewarded outguessing humans
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.
Medal of Honor: Allied Assault
scripted ambushes surprise only once
TimeSplitters
Spawn and pickup timing add mild uncertainty
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Medal of Honor: Allied Assault
encounter memorization, especially Omaha Beach
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.