very very close comparison, both very good CLASSIC Bay Area and West Coast albums, both release around the same time with similar features and sound, I have to go with Mr. Predicter, although a lot of people will probably say RBL mainly because RBL generated more press because they had nationwide radio and video play with Bounce To This (which sadly didn't include the man that produced and was featured on the album version, Mr. Predicter himself Cellski),
I have to go with Mr. Predicter though, that album is in my top 5 favorites ever, the beats, the style of rappin, the artists featured, the Bay at the time these albums came out was untouchable, and this is a big reason why, Livin In The Bay could have been a big hit, had it had a radio version, which it probably does, and maybe a video which was big for the Bay at that time too,
I dunno hard to explain, I'm sure a question that could be debated all day, everybody has there favorites, I give the edge to Cellski, although RBL was my favorite group when the original group existed, Ruthless By Law was partly a Cellski album anyway if you think about it, with him producing and appearing on more than one song