@jim said:
...has a nicer user interface...
Well, at least simpler (with lots of easy to use presets) and easy to use, fast to set up...
@jim said:
Is it correct to say anything that can be done in Twilight can also be done in Kerkythea, but may be more work to get there?
True. In fact, there are some features that are not present in Twilight but from Twilight, after setting everything up, you can easily export your model to Kerkythea and use those features there.