I watched this first episode just after I had watched four episodes of the BBC docu-fiction series about the Roman empire in general. I do not think it is easy to make a comparison since the BBC series tries to highlight certain important personalities and eras of the Western Roman world through out its history while Rome develops the personal history of a certain cast of characters during the final years of the Republic just before the emergence of the Principate. The opening titles of the series is impressive as well as character development which tries to have a "real" flavour.And one important detail Rome is much more sexually explicit than the BBC series which means that it will fare better commercially.