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.

Optimization · Pure Optimization
An open-world shooter-RPG won by perk routing and weapon mod optimization.

Optimization · Pure Optimization
Stealth routing that converges to memorised guard patterns and item paths.
Fallout 4 leans Optimization (Pure Optimization); Snake's Revenge leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 4
FPS aiming, VATS softens demand
Snake's Revenge
Dodging guards and boss fights need modest precision
Fallout 4 leans a little harder on reads, though the gap is small.
Fallout 4
Scripted enemy AI
Snake's Revenge
Guard patrols are fixed scripts, not minds
Snake's Revenge leans a little harder on variance, though the gap is small.
Fallout 4
Loot and legendary rolls
Snake's Revenge
Layouts and patrols unknown on first pass only
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 4
Perks, settlement, weapon mod planning
Snake's Revenge
Memorising routes and guard cycles is the core test
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.