head to head
World of Warcraft asks more than Portal, and the gap is reads.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.

Optimization · Pure Optimization
An MMORPG dominated by theorycraft, gear math, and rotation execution.
Portal leans Optimization (Pure Optimization); World of Warcraft leans Optimization (Pure Optimization).
World of Warcraft leans a little harder on execution, though the gap is small.
Portal
Portal placement timing modest.
World of Warcraft
Rotation APM and mechanics matter in raids
World of Warcraft leans clearly harder on reads.
Portal
No adversary modeling player.
World of Warcraft
PvP arenas have light read element
World of Warcraft leans clearly harder on variance.
Portal
Deterministic chambers; no randomness.
World of Warcraft
Loot tables and crit RNG present
World of Warcraft leans a little harder on optimization, though the gap is small.
Portal
Pure puzzle-solving optimization.
World of Warcraft
Gear, talents, and rotation are mathematically solved
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.