head to head
Neither is simply harder - they are hard in different places. Portal 2 demands more execution; Punch Club demands more variance.

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

Optimization · Pure Optimization
Scheduling training, decay and skill counters in a solvable management loop.
Portal 2 leans Optimization (Pure Optimization); Punch Club leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Portal 2
Portal placement requires some precision but timing is lenient.
Punch Club
Fights resolve automatically; you never throw a punch
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Portal 2
No opponent; puzzles are static.
Punch Club
Opponents are stat blocks with fixed styles, not minds
Punch Club leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
Punch Club
Fight dice rolls and event pop-ups add noise
Portal 2 leans a little harder on optimization, though the gap is small.
Portal 2
Solving the puzzle's logic IS the entire game.
Punch Club
Stat decay scheduling and skill-tree counters are 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.