head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Pure Optimization
Immersive sim aboard Talos I where build and route choices dominate.

Optimization · Pure Optimization
Using time-rewind to pre-solve grapple and kill sequences against fully deterministic guard patrols.
Prey (2017) leans Optimization (Pure Optimization); Shadwen leans Optimization (Pure Optimization).
Prey (2017) leans a little harder on execution, though the gap is small.
Prey (2017)
Wrench and Gloo timing modest.
Shadwen
Grapple hook timing and kill windows need care but are forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Prey (2017)
Typhon AI scripted, not adaptive.
Shadwen
Guards follow scripted patrol arcs without profiling player tactics
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Prey (2017)
Mimics and resource spawns randomized.
Shadwen
Child NPC pathfinding adds minor unpredictability to routing plans
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Prey (2017)
Neuromods, builds, station routing deeply solvable.
Shadwen
Time-rewind and rope construction enable full pre-optimisation of every kill sequence
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.