Interface Traffic Volume Very Different Between FortiCloud, FortiGate, and Speedtest

[tanr]

For the same block of time I just compared three traffic volume reports for a client:

[ul]

FortiGate Dashboard Interface Bandwidth Widget for wan port: 4.5 to 5.5 Mbps max down

FortiCloud FortiView Summary Traffic History Widget for wan port: 400-650 MB (no time scale or rate specified) down

Speedtest.net simple speed test from laptop (nothing else active): 70 Mbps down[/ul]

If the FortiCloud traffic history was Mbps and the speedtest was MB they would make sense, but as is, none of them seem to match.  Am I just reading or using these completely wrong, or might something else be going on?

[tanr]

Anybody else seen differences like this or can clarify why I'm seeing such big differences?  Thanks.