head to head
Diablo II: Resurrected asks more than Portal 2, and the gap is variance.

Optimization · Pure Optimization
The faithful remaster of Diablo II preserving its loot grind and build depth under new graphics.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Diablo II: Resurrected leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans a little harder on execution, though the gap is small.
Diablo II: Resurrected
Same forgiving click combat as the original
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.
Diablo II: Resurrected
Identical scripted monster AI
Portal 2
No opponent; puzzles are static.
Diablo II: Resurrected leans clearly harder on variance.
Diablo II: Resurrected
Loot tables and area randomization rule drops
Portal 2
Puzzles are deterministic with no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Diablo II: Resurrected
Decades of solved builds, breakpoints, and farming routes
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.