a '99 2.5 litre and a '01 S 3.2 litre.
And the 2.5 was more fun. Why? Because you had to be a better driver to get the same performance out of it. And you could stand on it longer without getting into trouble.
I totaled my '99 and the insurance proceeds were enough for the S. I'd rather have the 2.5 back.
My web site does have a list of the differences by model and model year for 986 models you may find useful.
http://mike.focke.googlepages.com/modelyeardifferences