It would be differentiable in the same way any more advanced technology than what we have now would be. It will have been created through scientific research and engineering, just like our own technology. Not understanding how something works doesn’t make it magic.

> It will have been created through scientific research and engineering, just like our own technology.

It seems a touch hubristic to assume that an advanced civilization with technological capabilities far exceeding our own would have used our processes and techniques to get there.

They’d have their own processes and techniques, but on some level they’d have to be discovering the properties of reality, then using that knowledge to create vessels that could travel between stars, slow down to visit planets, and do various other tricks that seem to defy physics as we know it (based on UAP observations). To me that’s still science and engineering even if it was done in completely different ways.