Hello!

CBSE is considered as one of the most toughest board in India. Nagaland board of school education is easier when compared to Central board of secondary education. More or less the concepts would be same for all boards but CBSE will have a lot of details within a concept (deep learning). CBSE will give you the chance to understand the concepts so teaching would definitely be better in CBSE than in NBSE. Hope the answer was helpful.

Thank You