Considering Defection From Kindle

Hello all. Long time Kindle user here (going back to Kindle Keyboard) and I'm strongly considering making the jump to Boox.

I do have a significant Kindle library, but the majority of it is backed up with Calibre and DRM stripped.

My current reader is a Paperwhite. The Boox equivalent looks to be the Go 6. But, I'm also intrigued by the options that support note taking, particularly the Tab Mini C.

I'm sure there are some folks here who have made this transition. What is your advice? What took the most getting used to? Should I get the Go 6, or dive into the deep end and get the Tab Mini?

Is there something similar to Kindle's Whispersync that I can set up between a Boox reader and a reader app on my phone (other than the Android Kindle app)?

Thanks for any guidance!