On page 17 the difference between the two models is well explained.
It's worth mentioning here that the researcher should decide whether the model is formative or reflective. But be aware that PLS is not recommended for mixed formative and reflective models, as mentioned on page 90 and the listed reference.
Dear Yasser Al Zaim thank you so much for the very useful and important point you mentioned. i never know and was aware that PLS is not recommended to use both mixed formative and reflective models.