[Quoth]

I think the only real value of the pen is the ewriter application. For ereader / ebooks highlight with finger and type in text for annotation. Copies to PC no problem.
Unless it's DRM free PDFs you need to doodle on, and then really only screen shots to capture doodles to PC.

The advanced Notebook is separate, an ewriter, and converts to plain text (if text only) or docx if converted text, diagrams, sketches and equations.

The pen can't be used to create computer text in ebook or PDF annotations like in the advanced Notepad.

So unless you want an 8" ewriter, or scribbles/doodles on PDFs a Forma is better, because in terms of annotation that exports to ANYTHING else, the ebook aspect of the Elipsa/Sage is simply like the Forma or Libra.

So Libra2 or Forma as an ereader and finger highlight with touch screen typed annotation which can export, or Sage/Elipsa pen doodle/sketch on ebooks that can't export, or use Sage/Elipsa as electronic notebooks (advanced mode, basic is mono sketching) with decent handwriting conversion to text. Text or docx export to PC. The Diagram & Equation and sketch stuff does export also to docx, but compared to PC Visio or PC equation editing it's awkward.

As serious ewriter the Elipsa is better as the sleep cover with pen dock and pen is included. The Sage cover has nowhere for the pen. Adds another €46 for pen and whatever for cover on Sage.
I might later get a Sage if there is a reduced price offer and use it on the go with a €10 generic cover and the Elipsa pen.

The Sage & Elipsa are like two products in one box, the regular ereader and the additional pen based Advanced Notepad as an eWriter. So the Sage is more a reduced size Elipsa rather than a Forma with a pen.