Hi buddy!
I don't have a lot of notes, the total space consumed by Evernote database is around 3GB. The most of them are text notes, in a mix of SQL scripts, source code, etc. I got around 5, 6k of individual notes. Some of them (a minor) contains videos, photos and PDF files.
I'm still trying OneNote, since it get a huge interface revamp, and now the free version relies 100% in the cloud: there is no (just the cache) files in your disk, so I believe that this is the reason for the very slow sync speed compared to Evernote.
The tags are migrated as a annotation in your 'new'