In the UK at least the S came with a dual round tip, I recently sold one.
You can see some more on my car here where there is a brief static video clip of the exhaust sound. You might need to register
http://www.boxa.net/forum/index.php?showtopic=59044 The sound has deepened a bit since then but I haven't taken another sound clip yet. Bear in mind mine is a UK car so only has one pair of cats to start with too. I'm quite happy with the sound. Its not quite as loud as my old eBay headers and exhaust, same as TopSpeed.