That said, assuming you are asking for a comparative academic essay on why the content of R.K. Kanodia’s volumes is often rated as superior to other GATE ECE resources (e.g., Made Easy, ACE Academy notes), here is a structured essay for you.
Unfortunately, I couldn't find a single paper that covers all volumes of RK Kanodia's GATE ECE study materials. However, I can provide you with some relevant information and resources that might help: rk kanodia gate ece all volumes pdf better
A very specific request!