Sr Adv: article 25 refers to practice of belief system by an individual. when same practice takes place as a group, it acquires the colour of the denomination. i am consciously not going into whether religion is a denomination.

article 25 uses religion and 26 uses denomination

CJI: article 26 also encapsulates religious affairs but article 25 talks of religious practices

Sr Adv: article 26 talks of denomination or a section thereof. that is also important. general understanding of what denomination is there may be a group of people who may not fall within that but they will still be a denomination