head to head
Portal 2 asks more than Deus Ex GO, and the gap is execution.

Optimization · Pure Optimization
Turn-based infiltration puzzles with fully solvable deterministic solutions.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Deus Ex GO leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Deus Ex GO
Turn-based taps, no dexterity at all
Portal 2
Portal placement requires some precision but timing is lenient.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Deus Ex GO
Guards move by fixed deterministic rules
Portal 2
No opponent; puzzles are static.
Deus Ex GO leans a little harder on variance, though the gap is small.
Deus Ex GO
Puzzle states are fully visible from the start
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans clearly harder on optimization.
Deus Ex GO
Each board is a literally solvable movement puzzle
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.