When making a safe cast on an object that might be...

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[Michael Friend]

When making a safe cast on an object that might be null, is there a difference between
val casted = nullable as? String and
val casted = nullable as String? ?
They both smart cast to String? but do they both give null if nullable is null and nullable casted to a string (assuming the cast is possible)?
I know using as? returns null if the cast fails and i assume option 2 would throw an exception, is that the only difference?