If you are maintaining the original fork then maintain using RAZA.

Well, the original ones were:
RAZA = Shareaza
RAZB = Shareaza Beta

However, the 'other' Shareaza fork deviation I've observed as using RAZI
I believe the 'I' representing the dev's first name, Ivan.

I don't know anything about the present day politics (if any) re: Shareaza, but I had been guessing Ivan wanted to go his own direction in regards to development.