RWD,
I haven't owned any of the Teres, Galibier, or Redpoint TT's simply because there is a substantial price difference between they and the Scheu. So, I really can't offer any informed opinion on the motors. The lowest priced Teres is still $1k more(1.5x), the Galibier is $2.2k more(2x plus), and Redpoint A is $6k more(4x) the Scheu.
But, I do have a
KAB Speedstrobe which is accurate to 0.03% at both 45 and 33.3 rpms and once the Scheu is tuned in, it doesn't show any visual variation at all. I have a geeky habit of checking when the TT is first turned a few LP's in and after a few hours.
Are there micro-fluctuations within the visual siting? Possibly, but I haven't been able to detect them by ear yet. I would think pitch variations would be detectable in sustained notes of solo musicians. My system is fairly revealing and accurate, so I would think any pitch fluctuations would stand out. Who knows, though?