What is the special night mentioned in surat ad-Dukhan (44:3-4)? And what exactly will be distinct?

What is the special night mentioned in surat ad-Dukhan (44:3-4 ) > Indeed, We sent it down during a blessed night. Indeed, We were to warn [mankind]. (3) > On that night is made distinct every precise matter - (4) Is it a different night than laylatu al-Qadr ليلة القدر, if so what night is it? And what exactly will be distinct in this night and why?