Difference between clicks on email performance report and clicks on email link performance report

Hello beautiful Marketo's members,

I have a problem with statistics in email reports for my newsletter

In my email performance report I can see 399 clicks for my last newsletter. The "clicks" on this report means as marketo says : "people who clicked at least one link in this email"

The problem is that in my email link performance report I don't see these 399 clicks :

So I don't understand, what does it mean ? What's the difference between these statistics ?

In email link performance report, Marketo indicate that "clicks" is :"number of links clicked" and "people" : "number of people who clicked the link".

Thank you for the help !

Marie-lou