4ocious

I've always wanted a Turbo S but settled on my 07 997.1 TT because the deal/price was too good to pass up. I recently saw a 2011 Turbo S(have not driven one, yet) and was wondering, is there THAT much difference (other than PDK and more HP)? Should I be happy with my 07 or begin looking for a gently used 11/12 Turbo S? Or, should I wait for the new 991 Turbo? BTW, these cars are GREAT and very different (and better IMO) than my former AMGs! Opinions please. Thanks