To compare snapshots, you must create at least two snapshots, then check two snapshots from the list in the left:
the click on the button “Compare Snapshots”,
if there is no documents to compare, this message appear
else you will see some thing like that :
in the table “Docuents to compare”, you will have the commun documents with different versions,
Note that :
For pages and blogs, click on the icon
to compare, the result is shown in an other tab,
For attachment, when you click
the two versions will be downloaded, then you can choose any comparator on ligne to get the comparaison