987 S – Delimitation of the 3.2l and the 3.4l variants?

Hello Porsche-Gemeinde, I plan with the start of the summer season possibly. the purchase of a used Boxster S! price range so around 40,000,-€ with as low mileage as possible and proper equipment. Therefore my question – to what extent do the two engine variants with 280hp and 295hp differ or are there model-specific peculiarities and peculiarities, which have to be considered during the purchase? And does this happen with the driving performances and consumption values according to your experience Is this also true for the 3.2? This brings me to the third part of my question: How important is the possibility that a Porsche guarantee can possibly be completed or extended when buying second-hand goods? This is always the subject of numerous offers. But somehow it bothers me a little bit that I seem to have a supposed KW. Onstruction error should additionally cover itself financially with almost 1,000,- €/year! Especially a possible replacement of the crankshaftsimmering once also not significantly more costs… Speak then such an insurance at all – or can there still other surprises lurk? I would be very pleased about your feedback. Greetz the OZ