So I have the note air 2, and the reMarkable because reasons.
The reMarkable feels like writing on paper. The Note Air 2 feels like writing on a piece of plastic. The reMarkable wins there.
The latency on both is about the same, in my opinion. The reMarkable might hesitate when you erase something big, but then it's completely gone. Switching pages takes just enough time to be annoying. On the Note Air 2, erasing is just as laggy. But, page switches are almost instantaneous. BUT, you will see a shadow of the previous page literally every time you switch pages.
For my money, the RM2 is worth it compared to the note air series.
I only have the Note Air 1 and I don't see any ghosting on page switches in the notes app. But they are running different firmware so who knows. Other apps it's settings dependent but you can set it to refresh every page turn if you want.
I'm sure RM feel is better but I bring up it's a plastic layer/nib feel and not something specifically built into the device. It's possible to get a better writing feel with a screen protector and a different nib on the Note Air. For me, writing is secondary to reading and the RM is just too limited in that regard.
The reMarkable feels like writing on paper. The Note Air 2 feels like writing on a piece of plastic. The reMarkable wins there.
The latency on both is about the same, in my opinion. The reMarkable might hesitate when you erase something big, but then it's completely gone. Switching pages takes just enough time to be annoying. On the Note Air 2, erasing is just as laggy. But, page switches are almost instantaneous. BUT, you will see a shadow of the previous page literally every time you switch pages.
For my money, the RM2 is worth it compared to the note air series.