head to head
SpellForce 2: Shadow Wars 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 RTS-RPG hybrid blending base-building strategy with hero-driven RPG progression.
Portal leans Optimization (Pure Optimization); SpellForce 2: Shadow Wars leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
Portal placement timing modest.
SpellForce 2: Shadow Wars
unit micro and hero control require some skill
SpellForce 2: Shadow Wars leans clearly harder on reads.
Portal
No adversary modeling player.
SpellForce 2: Shadow Wars
reading human opponents in multiplayer skirmishes
SpellForce 2: Shadow Wars leans clearly harder on variance.
Portal
Deterministic chambers; no randomness.
SpellForce 2: Shadow Wars
minor RNG in combat rolls
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
Pure puzzle-solving optimization.
SpellForce 2: Shadow Wars
build orders and hero builds dominate strategy
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.