head to head
Tastee: Lethal Tactics asks more than Portal 2, and the gap is reads.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.

Optimization · Pure Optimization
A simultaneous-turn tactics game testing positioning and predicting opponent commitments.
Portal 2 leans Optimization (Pure Optimization); Tastee: Lethal Tactics leans Optimization (Pure Optimization).
Portal 2 leans a little harder on execution, though the gap is small.
Portal 2
Portal placement requires some precision but timing is lenient.
Tastee: Lethal Tactics
Planning phase, no twitch aiming required
Tastee: Lethal Tactics leans clearly harder on reads.
Portal 2
No opponent; puzzles are static.
Tastee: Lethal Tactics
Simultaneous turns reward predicting human opponent moves
Tastee: Lethal Tactics leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
Tastee: Lethal Tactics
Low randomness, mostly deterministic resolution
Portal 2 leans a little harder on optimization, though the gap is small.
Portal 2
Solving the puzzle's logic IS the entire game.
Tastee: Lethal Tactics
Precise positioning and timing of merc actions
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.