1. Yes sound is REALLY important to a lot of folks. An aftermarket exhaust set up can help but it can't turn a FI sounding car into a NA high revving sound.
2. This car does not sound very good to me.
3. Yes the production car will sound different than this one, for sure.
4. I'd be willing to bet all of you posting that you can tell what the engine configuration (I vs. V) is by the sound could not actually do that in a blind aural test among Is and Vs.