sleeping/dwelling in sukkah - beautiful diyuk in the Rambam

I can’t let Chol haMoed pass without sharing this beautiful diyuk in the Rambam.
In ch six of hilchos sukkah, the Rambam in halacha 5 writes:
כיצד היא מצות הישיבה בסוכה: שיהיה אוכל ושותה ודר בסוכה, כל שבעת הימים בין ביום בין בלילה
What is the mitzvah of yeshivas sukkah? A person should eat, drink, and dwell in the sukkah all seven days [of sukkot] both by day and night…

In halacha 6 of the same chapter, the Rambam writes:
אוכלין ושותין וישנין בסוכה כל שבעה, בין ביום בין בלילה
We eat, drink, and sleep in the sukkah all seven days [of sukkot] both by day and night…

Two issues stand out: 1) Aren’t these two halachos identical – why does the Rambam repeat himself? 2) Why in halacha 5 does the Rambam refer to eating, drinking and dwelling (“dar”), but in halacha 6 he refers to eating, drinking, and sleeping (“y’sheinin”)? Have a look inside at the halachos and stay tuned for more...