Personally, I find that the 13,3 inch screen is best suited for PDFs. I had the 9,7 inch M96 and the experience was awful, especially when the document had small letters. Supposedly 10,3 inch is not much different.
The mobility argument is important to some people, but not to me. Actually it is hard to believe that you would read technical or scientific articles during commuting to work simply because you don't have enough time and silence to concentrate on difficult issues.
For sure, the design of Note is superior to Max2, but again Max2 is a tool for work, not something to show off.
Besides, the two pages in one will be the new feature coming in Neo Reader2 with the new Onyx update. That is great for having a better outlook of your text. This feature will not yield much on a 10,3 inch screen though.
The text resolution might be somewhat better by Note (220ppi?) because of the smaller screen, but believe me, 207 ppi is more than enough for crisp letters and images.
The software is almost identical, so here no difficult choice to do
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Take the advice of @Questionmark, to make a paper or carton cutout of each device to its full dimensions in order to find out which device proportions suit better your subjective preferences. Then think about your objective needs and make a final decision without looking back ever.