I always thought that the order (from loud to soft) was (all measurements taken inside the device):
1. a nuclear detonation.
2. a scram-jet engine.
3. Pagani V12 engine
4. 4C turbocharger.
5. 4C engine.
6. Ferrari V12 engine
8. a blender.
9. 4C Spider cabin with roof off.
10. 4C Spider cabin with roof on.
11. tumble-dryer full of rocks.
12. 4C coupe cabin.
13. aircraft carrier flight deck.
4,986. eiderdown pillow.
4,987 Cayman interior.
But I could be wrong.
There are a few people who have driven both enough to be able to give you an honest answer (perhaps even a serious one).
Be aware of an harmonic "drone" with the racing exhaust at around 75 to 80 MPH on level roads in 6th gear with the engine at around 2,500RPM. Not everyone has experienced it, but those that have will tell you that it can be ear-splitting. There are fixes ranging from selling the car to shifting down to another rev range, to a Helmholz chamber exhaust, to avoiding those speeds for any duration. There are several threads dedicated to that, including two current ones where people are doing projects to fix the situation themselves.
Beyond that, the car isn't all that bad considering that it is a street legal racer where NVH didn't likely even make the top 1,000 on a list of design considerations.