Hi Jan!
Yes, I compared both editors. For now, Author is very simple and it don't have any planning phase feature. Plume have more advanced features this moment.
But, Calligra Author developers are seeing Plume to get some features to Author. Check: http://ingwa2.blogspot.com.br/2013/08/calligra-author-next-step.html
I am using Plume now and I recommend it.
Yes, I compared both editors. For now, Author is very simple and it don't have any planning phase feature. Plume have more advanced features this moment.
But, Calligra Author developers are seeing Plume to get some features to Author. Check: http://ingwa2.blogspot.com.br/2013/08/calligra-author-next-step.html
I am using Plume now and I recommend it.