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 licensed action shooter testing basic aim through cinematic scripted missions.

Execution · Practiced Mastery
Linear sci-fi shooting plus spatial puzzles with fixed solutions.
James Bond 007: From Russia with Love leans Execution (Practiced Mastery); Prey 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.
James Bond 007: From Russia with Love
Lock-on shooting and driving need only basic dexterity
Prey
Standard FPS aim with portal disorientation added
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
James Bond 007: From Russia with Love
Henchmen follow scripted attack patterns
Prey
Alien enemies follow fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
James Bond 007: From Russia with Love
Linear missions hide little
Prey
Linear campaign with little randomness
Prey leans a little harder on optimization, though the gap is small.
James Bond 007: From Russia with Love
Gadget upgrades add a thin progression layer
Prey
Portal and gravity puzzles have fixed solutions
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.