Sorry, I don't feel like I'm being aggressive?
What status have the PhD student on the link you posted? Assistant or FNS-funded?
On this first link you posted from UNIL, you have the salaries for assistants (like me), and down below the salaries for the FNS-funded, which are a good 20k under.
Now, which one corresponds to EPFL? None? What is exactly a PhD student in EPFL? Is it the equivalent of an assitant at UNIL?