compare-locales output for multiple projects

Hi,

tl;dr: If you're not running compare-locales yourself, you can stop 
reading. If you don't run it on more than one project at a time, you can 
stop reading.

I'm currently making the output of compare-locales more useful in 
general, and I'm hitting a point where I'd like to ask a question about:

compare-locales _configs/browser.toml _configs/mobile-android.toml 
l10n-central ab-CD

By default, this shows the data for Firefox and then for Fennec. If you 
specify --unified, it shows them as one output, but you can't tell if a 
file is needing l10n to fix Firefox or Fennec. They're also showing a 
summary in each block.

Is anybody using the non-unified output, and if so, intentionally? If 
so, the file log or the summary or both?

If I can drop the difference between unified and not, adding 
--obsolete=no will be a bit easier ;-)

Axel