[Alexeryy]

There is no cleregy system in Islam but a meritocratic system. Those with limited knowledge feels there is no such thing and for them everyone tom Joe blogg are the same in their knowledge and piety.

A Mufti who has undertaken study of ifta and as such an expert in Fiqh. This mean they had to have studied tafsir and Hadith sciences along with other islamic sciences.

A hafiz means who has memorized both Quran and Hadith. In history this means they would have perhaps memorised other related texts.

A Mawlana means a teacher. A mufti or any scholars can be referred to as maulana.

Muhadith: someone who has studied hadith sciences and is a master in the field of hadith study.

Shaikh means an elderly person / wise. In religious circle depending on where you are in the world, the term shaikh is used in many ways i.e Shaikhul Hadith - someone who teaches hadith and its sciences and has ijaza and isnad.

Imam: generally used as someone who leads salat. This term is also used for the highest ranking scholars i.e Imam Abu Hanifa, Imam Malik etc.

Mujadid: a term used for those who revive the religious understanding and contributes in scholarly field as well as to the betterment of ummah. Hence Mujadid can be used for the Imams or an expert in any religious field.

Wali: Anyone who reminds you of Allah are Allahs friend. A sincere humble believer could be a wali whose words, action and silence and inaction makes reminds you of Allah and his Rasul (AS).

Pir: Generally means a spiritual guide. Someone who has the capability to guide a person for spiritual betterment of any muslims. A Mufti or a muhaddith could be under a spiritual guide. They deal with only internal aspects / Tassawuf.