https://trisquel.info/en/trisquel-60-lts-toutatis-has-arrived
This paragraph may explain the difference:
Accessible by default
In the quest for an improved experience for disabled users that we started
some releases ago we used to make an special version (the International live
DVD) that came with the digital ramps turned on by default. In this release
we took that idea one step further and now all the images are equally
accessible for visually impaired users: if while booting the live cd you
don't touch any key and let the 30 seconds countdown finish, the screen
reader will be on when the desktop is launched."
