Sony DPT-RP1 user here. It's a similar large screen e-ink reader with writing support. It's of great help to me for PDF reading and taking notes. My opinion on reMarkable 2 (from the page):

Disadvantages: - can only transfer with WiFi - not A4 sized (I find this important for most of books and papers)

Advantages: + epub support (DPT only works with PDF) + customization (DPT software is completely uncustomizable, but good enough for most daily use, e.g. the screen can be synced to the computer screen for remote meetings) + OCR + cheaper (the A4 version of DPT is $600)