Speaking from experience, the sedan feels slightly more solid in stock form. This shows not just in the handling, but the little squeaks, rattles, and road noise that are so prevalent in the hatch are nowhere near as noticeable and irritating in the sedan. The slightly longer wheelbase gives the car a slightly different feel, as well. A lot of people prefer the 4 door's handling to the 2 door...I can't say whether I have a preference or not. You can feel a difference though.
As for the sound of these cars, and the godawful fart cannon style mufflers, I bought my car with a full aftermarket exaust including header. It was a fart cannon, and while it performed very nicely, it sounded so bad that I purchased a used stock axleback for $30 and replaced the aftermarket muffler that had cost $500 new. My friends called my car "The Swarm of Bees":lol: Now it's just slightly louder than stock, but the exhaust is drowned out by intake snarl. I love it