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
A vault management sim about optimising dwellers, rooms, and resource loops.

Optimization · Systems & Chaos
A short time-loop horror testing observation and deduction across repeating corridors.
Fallout Shelter leans Optimization (Pure Optimization); We Went Back leans Optimization (Systems & Chaos).
We Went Back leans a little harder on execution, though the gap is small.
Fallout Shelter
Tapping menus only
We Went Back
Walking a looping station needs no dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout Shelter
No opponent
We Went Back
Scares trigger on script, never adapting
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout Shelter
Incident spawns and lunchbox loot rolls
We Went Back
Loop changes are unknown until observed once
Fallout Shelter leans a little harder on optimization, though the gap is small.
Fallout Shelter
Dweller stats and room layout are fully solvable
We Went Back
Noticing loop differences and deducing the exit is the game
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.