When it comes to portrait work, I would prefer
Likebook Alita over Note Air.
It has a slower CPU, but 1 GB more RAM and what can be important, SD expansion - I use a 512 GB card.
I have both, using Alita in portrait mode for handwritten comments and notes in document work (music scores, study scripts, etc), while I use Note Air exclusively in landscape mode as a glare-free notebook with keyboard, stylus and remote control (the screen is too slow for mouse or touchpad).