Bookmarks are simple enough, as long as you have both browsers installed. I haven't found a way to sync them by logging in with Google, but locally stored bookmarks work. To do this:
Go to settings
Type 'Browser' into the search bar
Under 'Default browser' there should be a button that says 'Import bookmarks and settings'
Click it, select the browser to import from, and select what you want to import
I know it's not what you originally wanted, but at least it's a partial solution.
Hope it helps! 🙂