They're both fire... but man THE DOC is the shit!!
after reading most of the opinions about DOC, i was disappointed when i heard the album for the first time. There are some very good tracks on DOC's album and some are better than 50's. Overall 50 cent in my opinion has the better album.
D.O.C.'s compilation (yeah, it isn't a true solo album in my eyes...) doesn't have any wack tracks but it's also missing some really big bangers. 8/10
On the other hand, 50's album contains some soon to be classic songs (e.g. "Heat" and "If I Can't") but there are some piss poor songs like "P.I.M.P." or "Like My Style". I'd give it a 6/10 rating.