I read a lot of books (both technical and non tech books). I have a kindle Oasis 2017 and recently bought a Boox air note , to read tech doc on pdf format that

I read a lot of books (both technical and non tech books). I have a kindle Oasis 2017 and recently bought a Boox air note , to read tech doc on pdf format that may require paginating going back and forth and review a fair number of diagrams in previous pages or chapter the Boox is way better. The problem is that any 10 inch ereader will be way more weighty that a kindle oasis or paperwhite. So if you are sure that you will mainly read while walking I would go for a 7 inch paperwhite or oasis.