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

Optimization · Pure Optimization
Classic turn-based operational wargame about blitzing across WWII campaign maps with a carryover core army.
Fallout Shelter leans Optimization (Pure Optimization); Panzer General 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 Shelter
Tapping menus only
Panzer General
Turn-based hex moves; no physical demands
Panzer General leans a little harder on reads, though the gap is small.
Fallout Shelter
No opponent
Panzer General
Scripted AI opponent; no adaptive modeling
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
Panzer General
Combat dice rolls and hidden enemy deployments
Panzer General leans a little harder on optimization, though the gap is small.
Fallout Shelter
Dweller stats and room layout are fully solvable
Panzer General
Prestige economy, unit upgrades, optimal advance routing dominate
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.