Three cylinders give an engine its count, not its complete character. In an inline triple the cylinders sit in one row, as they do in the MV Agusta Brutale 800 and F3 RR. Other three-cylinder arrangements are mechanically possible; 'three-cylinder' and 'inline triple' aren't universal synonyms. What matters on either MV is the engine's actual specification and the motorcycle it has been built to propel.
The governed Brutale 800 uses a 798 cc three-cylinder engine in a naked road bike, where exposed mechanicals and a less enclosed riding position change the daily experience. The MY23 F3 RR technical sheet also identifies a 798 cc three-cylinder engine, but there it sits inside a faired supersport designed around a different riding posture and aerodynamic brief. A common cylinder count doesn't turn the F3 RR into a Brutale with bodywork, or the Brutale into a stripped F3.
The F3 RR's manufacturer sheet is the reference for its exact generation; later Ottantesimo equipment should not be carried backwards. The same goes for claims about a counter-rotating crankshaft or electronics: they belong to a particular documented engine and model, not to every inline triple. Against an inline-four, the immediate difference is one fewer cylinder in the row. Any claim about delivery, noise or performance needs more evidence than that.