With the stock Base Roadster the difference is pretty good. The sound is tighter and seems louder. The main reason I made the switch was to allow for control of the 12 Disk changer which I plan to add soon (and for MP3 capability). I'm not sure I'd have changed out the radio just for the sound - even if it is better.

However, for $140 it was pretty much a no-brainer!

The match is so close you have to really look in the right light to notice that the color is a slight bit darker - not really noticeable unless you look carefully -and frankly - I like the look...