all the sect that Buddha teaching based on like zen ,pureland ,esoteric is zong men (sectarian) school and
teaching based is the teaching of Buddha not categorised into any periods of teachings
like Shurangama , Mahaparibbana sutta and even Maha Ratnakuta Sutra
is teachings based .
sectarian school provide a established method of practise whereas teachings based is more freedom of expression in practise