Building comparison
head to head
Digimon World 2vsFallout Shelter
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.
Digimon World 2
Optimization · Pure Optimization
Dungeon-crawling PS1 sequel built around DNA digivolution and grinding through randomized domains.
Fallout Shelter
Optimization · Pure Optimization
A vault management sim about optimising dwellers, rooms, and resource loops.
Digimon World 2 leans Optimization (Pure Optimization); Fallout Shelter leans Optimization (Pure Optimization).
Digimon World 2Fallout Shelter
Axis by axis
Execution0 vs 0
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Digimon World 2
Turn-based dungeon crawling; no dexterity
Fallout Shelter
Tapping menus only
Reads0 vs 0
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Digimon World 2
Fixed AI encounters only
Fallout Shelter
No opponent
Variance4 vs 4
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Digimon World 2
Random dungeon layouts and recruitment rolls
Fallout Shelter
Incident spawns and lunchbox loot rolls
Optimization8 vs 7
Digimon World 2 leans a little harder on optimization, though the gap is small.
Digimon World 2
DNA digivolving and party math are the whole game
Fallout Shelter
Dweller stats and room layout are fully solvable
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.