I think the debate on who is better is simply neutral. There is no hard cut fact on who is better. I will give my completely ubiased opinion. DJ Premier has made some of the best beats ever, on some of the best albums ever. Premier has been a major part of all of the Gangstarr albums, which are all at the very least, good. Through the months, I have compiled a giant list of all the work DJ Premier has took part in, and have heard every beat he has released. And I will tell you this, his diversity is lacking. A lot of the beats are the exact same formula. A loop that'll maybe change up once, with a scratch hook. Not much drum variation, and repetitive bass. These are, essenitally, the only knocks you can have on Premier because the beats he makes are nothing short of outstanding. But at the end of the day, the craft and skill behind RZA puts him ahead of Premier.