Is there a neshama yesera on chag or only shabbos? And what is the second sign on chol hamoed since we don't wear tefillin. (In reference to shabbos,Brit,tefillin)

Many rishonim wrote there isn’t (rashbam wrote there is . דברי יציב wrote there is but less.
The nafka mina is if you have to say bsamim at motsaei Yomtov. Lemaase we don’t say it