head to head
Portal asks more than Creeper World 4, and the gap is execution.

Optimization · Pure Optimization
A strategy game about damming a fluid enemy with an optimized energy economy.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Creeper World 4 leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Creeper World 4
Light real-time micro placing and moving units
Portal
Portal placement timing modest.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Creeper World 4
The creep flows by fixed simulation rules
Portal
No adversary modeling player.
Creeper World 4 leans a little harder on variance, though the gap is small.
Creeper World 4
Fluid behaviour is deterministic once terrain is understood
Portal
Deterministic chambers; no randomness.
Creeper World 4 leans a little harder on optimization, though the gap is small.
Creeper World 4
Energy economy and frontline routing decide everything
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.