Honest reply coming up !
I have only had and still have a 964 but have driven a 996 , got my 64 two years ago , it had 130000 miles on the clock well serviced without a rebuild but had a new clutch and fly wheel at 100000 miles , i have put 35000 miles on it in two years , its never failed in any way what so ever , oil pressure and compression all still good use it "every" day, it is ultra usable and reliable.
They are know to leak oil but these problems should have been sorted out years ago if you buy one.
Servicing costs i think are slightly higher than a 996, i have spoke to a few people who have gone from the 996 to the 964 but none that went 964 to 996 although the 996 is still a beautiful car to look at , i had good drive of one and it was not at all like a 964 , still a lovely solid 911 but closer to a everyday car than the 64 somehow a totally different experience .
The 964 just has more connection to the road, more heart & soul, air cooled , sounds and smell , you just cant beat looking out over those torpedo wings, for me anyway more of a drivers car but each to there own , you MUST have a good drive of both.
no offence 996 drivers , we all have our faves :bye: