cls63 sound...
But you never know what those crazy scientists are up to...
To some extent, though, an engine's sound can be modulated by the exhaust valve timing. For example, if the exhaust valve is opened sooner (which is sometimes done on forced-induction engines to increase blowdown), the exhaust tone can have a deeper, more knarly sound.
Whether one engine will sound better than another engine will be in the ears of the beholder. The best you can say is they will probably sound different.







