head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Pure Optimization
A narrative RPG that tests knowledge of its philosophical systems and dialogue trees more than any combat skill.

Optimization · Pure Optimization
Classic open-world RPG where stats and broken crafting systems trump twitch skill.
Planescape: Torment leans Optimization (Pure Optimization); The Elder Scrolls III: Morrowind leans Optimization (Pure Optimization).
The Elder Scrolls III: Morrowind leans a little harder on execution, though the gap is small.
Planescape: Torment
Combat is deemphasised; the game is built to be avoided or trivial
The Elder Scrolls III: Morrowind
Dice-roll combat ignores aim skill
Planescape: Torment leans a little harder on reads, though the gap is small.
Planescape: Torment
NPCs are scripted personalities; no adaptive opponent exists
The Elder Scrolls III: Morrowind
No adaptive opposition
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Planescape: Torment
Some dialogue outcomes and item discoveries are hidden until explored
The Elder Scrolls III: Morrowind
Hit chances rolled behind the screen
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Planescape: Torment
Stat allocation, dialogue routing and companion management reward system mastery
The Elder Scrolls III: Morrowind
Alchemy and spellcrafting are famously solvable
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.