Maserati V6 better than BMW I6 or V8? No way.
Everything depends just what they wan´t to make on factory, F10 M5 owners someone like pretty quiet stock sound and then is performance exhaust. 335i is family car, so quiet is better on stock and 1M was engineered so fast that they maybe have not time to tune exhaust. That Maserati sound like regular V6, I prefer hundred times more I6 engine sound which scream more higher tone and smoother.
Some really want BMW sound like Maserati V6?