Well that's easy. Swift is:
1. Much more expressive and featureful than Go
2. More concise and modern than C# (debatable maybe?)
3. Less JVM than Kotlin (the apples-to-apples; Java is a much worse language)
4. Way, way faster and more typesafe than Python
5. Better support for parallel execution (and probably fine-tuning other performance knobs) than TypeScript