difference in Boxster S and Boxster S anniversary edition

[mountainman]

I have owned a 2004 Boxster S anniversary Edition for many years and drive it hard among all the other later model boxsters, caymans, 911's, etc and have always been happy with it's performance and never have to feel inadequate when driving with the big boys. I recently bought a 50K mile 03 Boxster S and and until then I wasn't really aware of the difference in the performance of the 2. Even though the 04 has over twice the miles of the 03 it still has considerable better power, suspension and sound. I know it has 6 or 8 more HP, a different exhaust and stiffer suspension and maybe a larger TB, but am amazed at the difference in the 2.