OneNote is a "digital notebook," which essentially means that this app is for your note-taking first and these notes can be shared. A OneNote notebook can be shared with others, but that is not its sole intention.
Loop, on the other hand, is specifically designed with the purpose of collaborating and making plans with teams as its first use-case.
Impossible to "undelete" on a mobile device. You must go back to your office and log into your PC.
Ctrl-Z does not work. There is no "Undelete" option anywhere.
Convoluted and stupid method when using the Evernote app on a PC.
Select the note that lost the content > Click on the three dots (...) in the top right corner of the app's window > Note history > Make a guess as to the date and time the content was deleted > Restore
Note: you can only export data using the Evernote local application for PCs or Macs; you can’t do it from the web or mobile versions.
In current versions of Evernote (version 10 and up), you can only export 100 notebooks at a time.
On the other hand, if you export notebook by notebook, you can export all the notes in each notebook and keep your notes organized (if you just export all the notes, you lose that organization).
Very difficult to successfully export from Evernote and import to OneNote. See OneNote comments about Evernote2OneNote (below).
Notion lets you upload five different file types: plaintext (.txt), markdown (.md or .markdown), Microsoft Word (.docx), CSV (.csv) and HTML (.html). It also offers import tools for a number of other apps, including Confluence, Asana, Evernote and Trello.