Regarding pitch control: SME turntables and many other belt drive turntables are criticized for not being speed accurate. There are at least five top classical conductors and 10-20 professional musicians in Europe who own SME tables and the dealer from whom they bought their tables recently told me that not one has ever complained about the his table having pitch problems. And this is a group of owners who know how music sounds. I just think that is an interesting observation.
I can't say anything about SME and speed but you find for everything a matching example. May I tell you a little story, it is a bit different, but in a way comparable. A few years ago I was in a group of BMW M5 drivers, some were really fanatic (not me, they were worse), they read the test reports about the car in the car mags (acceleration and so on ). went on the highway in the night and drove all those tests with their own cars...
All were slower. Far away from the test specs...They went to their car dealer who said "Hey, we sold now 50 of them and you are the only ones who are critical.." and shut the door. They didn't accept that, they went with their cars on the dyne for a test ride. At 100mph the engine stopped accelerating. there was an internal program in the car software that "knew" that someone wants to know how many HP the engine has (not all wheels rolling). Normally that story was done. But, they went to a Dyno Manufacturer who also delivered BMW / MB / Porsche and they knew the programming :-) Long story short:
None of those cars had the HP in reality. They went back to their dealer and said, Buddy, we paid for 408 HP and we got 360, max. speed lacks for 15%...acceleration is 1 s slower.... And don't try to tell us some stories, here are the reports and when you don't believe us, then bring us the M5 which was used in the mags for the tests...
Anyway... these guys ALL won, they all got new engines.
The other 45 not.