In Android N Dev Preview 1 (which I'll refer to as N1 from now on, to abbreviate), the Downloads app has the package name, whereas the Files app (ie the file explorer that shows up when you go to Settings > Storage > Explore) has the package name

In Android N Dev Preview 2 (referred to as N2 from now on), both apps have the same package name.

This means that they're essentially the same app and this will become apparent as we go through all of the changes that this merge has caused.