Opera Mini sends different user agent if it's in Mini or Turbo mode and UC Mini has a little different user agent than the rest of the UC browser.See: https://wikitech.wikimedia.org/wiki/ProxyBrowsers
Break up the stats for Opera Mobile so that we could have mini with "mini data savings" in one bucket and the same with UC mini. It's the same browser family but the behavior is totally different. If we can do that, it will make it easier to see if our changes will have impact