Building comparison
head to head
Pokemon XvsPortal
Neither is simply harder - they are hard in different places. Pokemon X demands more variance; Portal demands more execution.
Pokemon X
Optimization · Pure Optimization
The first fully 3D mainline Pokemon adventure, introducing Mega Evolution and the Fairy type in Kalos.
Portal
Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Pokemon X leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Pokemon XPortal
Axis by axis
Execution0 vs 4
Portal leans clearly harder on execution.
Pokemon X
Menu-driven combat throughout
Portal
Portal placement timing modest.
Reads2 vs 0
Pokemon X leans clearly harder on reads.
Pokemon X
Scripted opponents; online battling optional
Portal
No adversary modeling player.
Variance3 vs 0
Pokemon X leans clearly harder on variance.
Pokemon X
Wild encounter and catch randomness
Portal
Deterministic chambers; no randomness.
Optimization8 vs 8
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Pokemon X
Mega Evolution timing and team planning dominate
Portal
Pure puzzle-solving optimization.
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.