Bandwidth monitoring

Awstats shows me much lesser bandwidth usage than the virtualmin bandwidth monitoring. Which is correct ?

Example: Awstats: 5.06 GB
Virtualmin: 19.35 GB

Such a huge difference.

One possible explanation might be: the VMin bandwidth monitoring includes, by default, all traffic (WWW, FTP and Email), while AWStats probably only captures website (WWW) traffic.

That wouldn’t be possible as the bandwidth graph shows FTP transfers (88.34 MB) and Mail transferred (395.71 kB)