The Remarkable2 tablet uses a pen with disposable nibs, which means you get good writing feedback. In addition, they optimized the e-ink display for writing by minimizing the distance between the display layer and the pen (ie, less gap between the tip and where you see the writing). The device also has generally minimal lag.
If an iPad is 60% of the writing experience, the RM2 is 80+%.
[0] https://en.wikipedia.org/wiki/Compaq_Concerto