Re: 172S vs 172SP - what\'s the difference?
I've flown both, but I've seen no difference other than some aesthetics. The C172S has a slightly different interior than the SP (seats, door liners, etc.), and the headset jacks are located in a different place. The 172S I flew had a KLN89B GPS, while the SP had a KLN94 (though I'm sure there are plenty of S models with a 94). Performance figures are no different from what I've seen, and they both handle the same. If you have a 172S POH and you want to fly an SP, there should be no problem at all.