head to head
Neither is simply harder - they are hard in different places. Freshly-Picked Tingle's Rosy Rupeeland demands more reads; Portal 2 demands more optimization.

Optimization · Pure Optimization
An adventure about haggling and managing money where rupees are your life force.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Freshly-Picked Tingle's Rosy Rupeeland leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans a little harder on execution, though the gap is small.
Freshly-Picked Tingle's Rosy Rupeeland
Simple touch controls; little twitch demand
Portal 2
Portal placement requires some precision but timing is lenient.
Freshly-Picked Tingle's Rosy Rupeeland leans clearly harder on reads.
Freshly-Picked Tingle's Rosy Rupeeland
NPC haggling has fixed thresholds, not adaptive modeling
Portal 2
No opponent; puzzles are static.
Freshly-Picked Tingle's Rosy Rupeeland leans clearly harder on variance.
Freshly-Picked Tingle's Rosy Rupeeland
Price-guessing has hidden bounds to probe
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans clearly harder on optimization.
Freshly-Picked Tingle's Rosy Rupeeland
Managing rupees and haggling efficiently is the core test
Portal 2
Solving the puzzle's logic IS the entire 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.