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

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

Optimization · Pure Optimization
A faction-routing RPG where custom spell combinations and allegiance optimization define the most efficient path.
Portal 2 leans Optimization (Pure Optimization); Tyranny leans Optimization (Pure Optimization).
Portal 2 leans clearly harder on execution.
Portal 2
Portal placement requires some precision but timing is lenient.
Tyranny
Combat is secondary; faction routing and dialogue are the main skill axes
Tyranny leans a little harder on reads, though the gap is small.
Portal 2
No opponent; puzzles are static.
Tyranny
Scripted NPC factions respond to choices but follow fixed logic trees
Tyranny leans clearly harder on variance.
Portal 2
Puzzles are deterministic with no randomness.
Tyranny
Skill check thresholds and hidden lore flags create unknown-information branches
Portal 2 leans a little harder on optimization, though the gap is small.
Portal 2
Solving the puzzle's logic IS the entire game.
Tyranny
Combo spell crafting and faction reputation routing reward system knowledge
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.