Emby for Kodi questions

I have been running Kodi with a MySQl db for years and I’m considering swtiching to Emby for Kodi but I have some questions:

1. Does Emby scrape/maintain all the same tags as Kodi (IMDB Top 250, last played date and play count for example)?
2. Does Emby use the actual file runtime for the duration tag?
3. From what I read, the first time you run Emby for Kodi it syncs the Emby db with the current Kodi one. Does it do that with the MySQl db too or only a local Kodi db?