Thanks for the info. My owners manual that they got me (one ordered from porsche, as the original owners manual was not in the car) says 295, but I was unsure if it was for the correct year. All the owners manual says was that it was printed in 2006.
So I guess the boxster S has 280 hp in 2006 and the Cayman S has 295 hp in 2006 (US Models).
I drove both a 2006 boxster S and 2006 Cayman S and the Cayman Sfelt faster. I was unsure if this was due to the PSM and Sport options on the Cayman S.