head to head
Neither is simply harder - they are hard in different places. Honkai: Star Rail demands more variance; Portal demands more execution.

Optimization · Pure Optimization
A turn-based RPG where relic substat variance and speed-tuned team optimisation define endgame performance.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Honkai: Star Rail leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Honkai: Star Rail
Turn-based; physical input precision is essentially irrelevant
Portal
Portal placement timing modest.
Honkai: Star Rail leans a little harder on reads, though the gap is small.
Honkai: Star Rail
PvE only with scripted enemy behaviour throughout
Portal
No adversary modeling player.
Honkai: Star Rail leans clearly harder on variance.
Honkai: Star Rail
Relic substat RNG and gacha pulls drive character progression
Portal
Deterministic chambers; no randomness.
Honkai: Star Rail leans a little harder on optimization, though the gap is small.
Honkai: Star Rail
Speed tuning, team cycle theory, and buff windows are deeply solvable
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.