head to head
Recettear: An Item Shop's Tale asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.

Optimization · Pure Optimization
Item-shop management sim where you set prices to pay off a fairy's loan.
Portal leans Optimization (Pure Optimization); Recettear: An Item Shop's Tale leans Optimization (Pure Optimization).
Portal leans a little harder on execution, though the gap is small.
Portal
Portal placement timing modest.
Recettear: An Item Shop's Tale
Light action combat in optional dungeon crawls.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
No adversary modeling player.
Recettear: An Item Shop's Tale
Customer haggling follows mappable scripted tolerances.
Recettear: An Item Shop's Tale leans clearly harder on variance.
Portal
Deterministic chambers; no randomness.
Recettear: An Item Shop's Tale
Market price swings and dungeon loot rolls.
Recettear: An Item Shop's Tale leans a little harder on optimization, though the gap is small.
Portal
Pure puzzle-solving optimization.
Recettear: An Item Shop's Tale
Pricing margins, stock, and debt schedule are nearly 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.