head to head
X4: Foundations asks more than Terraria, and the gap is optimization.

Optimization · Pure Optimization
A 2D sandbox where preparation and gear tiering carry boss fights.

Optimization · Pure Optimization
Open-ended space simulation of trading, station-building and faction warfare.
Terraria leans Optimization (Pure Optimization); X4: Foundations leans Optimization (Pure Optimization).
Terraria leans a little harder on execution, though the gap is small.
Terraria
Boss fights require dodging and aim under pressure.
X4: Foundations
Flying your own ship matters early, fleets later.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Terraria
Bosses use scripted attacks; no adaptation.
X4: Foundations
AI factions follow mappable economic logic.
Terraria leans a little harder on variance, though the gap is small.
Terraria
World seeds and loot drops randomized.
X4: Foundations
Simulated wars create some unpredictability.
X4: Foundations leans clearly harder on optimization.
Terraria
Gear progression and arena prep solve every boss.
X4: Foundations
Station logistics and empire economics are a pure engine problem.
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.