head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
God game blending city building, creature training and conquering by awe or force.

Optimization · Pure Optimization
A first-person shop management sim about stocking shelves, setting prices and growing a small supermarket.
Black & White 2 leans Optimization (Pure Optimization); Supermarket Simulator 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.
Black & White 2
Gesture casting and creature handling need mild dexterity.
Supermarket Simulator
Stocking and checkout are light manual busywork.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Black & White 2
Creature learning is trainable, not adversarially adaptive.
Supermarket Simulator
Customers follow simple scripted demand.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Black & White 2
Creature behaviour quirks add some unpredictability.
Supermarket Simulator
Daily customer flow varies a little.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Black & White 2
City impressiveness versus army economy is the solvable choice.
Supermarket Simulator
Pricing margins, ordering and shelf layout drive growth.
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.