For example I pray two nafil with small surahs like Surah Naas and Surah Falaq without any mistakes. But if I pray two nafil with Surah Rahman and Surah Waqia I feel I may be making some mistakes. Is my prayer with longer surahs with few mistakes in tilawat better then prayer with smaller surahs.
Assalaamu Alaykum Wa Rahmatullaahi Wa Barakaatuhu
Your Nafl Salaat with longer Surahs and making mistakes is more virtuous
than reciting shorter Surahs.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai