I'm going to answer with what is cool with a Remarkable against a paper notebook when it comes to writing : you can easily erase shapes, strokes, undo, resize, copy, paste, add pages between... To me that's a lot of advantages only for the comparison of the actual "writing tools" even not taking into account the "extras".

Disclaimer : I sold my remarkable because I had a tiny but noticeable "gap" between the stylus and the "ink" and I wasnt able to tolerate it. But I'm missing the edition features.