[Quoth]

Advantage of Nebo vs Gboard for handwriting:
1) Auto shapes
2) Auto formula
3) more space to write on a tablet instead of a touch pad that barely holds one word.
4) More natural size (only the TCL NxtPaper phone works with Nebo with no stylus, Nebo otherwise needs EMR or other true stylus. Doesn't work with separate EmmR/Wacom tablet.
5) Built in import of PDF
6) Various exports (PDF, docx, HTML, PNG etc. Docx is best unless it's an imported PDF.
7) Complete notetaking app with hierarchy etc. Gboard is only a text input method for an app.
8) Sketches with handwriting as text.
9) Annotation on imported PDF can be as is (new layer on other PDF viewers) or converted to computer text (will copy/paste in any decent PDF viewer)

Note you can't change the language of a notebook in Nebo, but if you add a language, then English is still recognised. So add German, Spanish, French, Irish Gaelic etc to have recognition of words with accents. Such as café instead of cafe.

Both do real time preview.

Gboard performance is useless to display handwriting on eink Android and preview, so I guess that's why Nebo on eink Kobo is so poor and has no preview. I've never used Notebooks on Kobo since getting Nebo on my TCL Nxtpaper11. I was able to import all the existing nebo files from Kobo Sage and Kobo Elipsa.

I don't use Nebo on my TCL Nxtpaper phone, too small. But I use Gboard handwriting on it and my other phones for SMS, text notes, Viber messenger, search & etc, anything except phone numbers.