In my experience, if you're not doing programmatic access into your synced folders, onedrive and Dropbox perform similarly enough to not make a noticeable difference to the average user. But if you do large amount of read / writes to the folder, both of them struggle with it.

My company currently does this currently, as we wait for a more seamless system to be set up. So it does a write every minute of the day to a Dropbox sync folder. Which only syncs up once every few minutes. So essentially I do miss a few minutes in a day, but since it's just a human consuming the data, I don't mind.