Complex sentence: The pasta is similar in shape to Sardinian "Fregula" but is not the same as North African couscous, which in Tunisia is called "Kusksi" or sometimes "Kusksu".
Split into simpler sentences: The pasta is similar in shape to Sardinian "Fregula". Despite the name it is not the same as couscous, which in Tunisia is called "Kusksi" or sometimes "Kusksu".