What oral exam is this you speak of? No such thing over here. You'll have a chat about your flight planning etc, but there's no FAA-style oral.
Standard CPL test would contain a departure, nav leg, diversion, general handling, instrument flight, nav-tracking and circuits. In an SEP you'll do a practice forced landing, and in an MEP you'll do asymmetric work. Not massively different from the PPL test in content, although to a higher standard.