How does event handling differ between Solar2D and Unity?

Event handling is done differently on Solar2D and Unity, I’m learning about Solar2D/Corona and Lua these days to build my first game and would like to know the differences in a more detailed manner.
I couldn’t find much documentation, if you could provide an explanation with references that would be really helpful

I don’t think somebody made such analysis, but surely Solar2D doc tells you all you need to know about its events:

can I ask you something? what do you mean by it is done differently?

Eventually all programming languages will have an event handler to handle the event!

The events should also be the same for all languages like Tap, Touch, Multi Touch, Download, Upload, etc.

So if you are still not familiar with Solar2D, then what exactly do you mean by differently