head to head
Portal asks more than LEGO Bricktales, and the gap is execution.

Optimization · Pure Optimization
Engineering structurally sound brick builds under physical constraints.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
LEGO Bricktales leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
LEGO Bricktales
Placing bricks needs care, not speed
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.
LEGO Bricktales
No opponent in a diorama
Portal
No adversary modeling player.
LEGO Bricktales leans a little harder on variance, though the gap is small.
LEGO Bricktales
Puzzles are fixed once seen
Portal
Deterministic chambers; no randomness.
Portal leans clearly harder on optimization.
LEGO Bricktales
Engineering stable builds within constraints is the test
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.