I own an AR ES1 and also a MMF 9.1 and have used a VPI 19 Mk 3 for sometime and have owned direct drive tables. Here are a few observations:
The "nonsense comment" above regarding belt drive table stability is perhaps misleading. Generally, belt drives cost effectively isolate the motor and platter and dramatically reduce the transfer of motor and bearing noise to the stylus compared to direct and idler wheel designs. Direct and idler designs will transfer any problems straight into the platter that will impact sound quality.
A review of wow and flutter test done in the 60s - 80s shows that stability is a function of excellent execution of the design vs the use of belts or direct drive approaches to turn the platter.
Direct drive can work and sound great but require great attention to detail and quality control which can be difficult to build at a reasonable price point. Belt designs are generally more forgiving and yield excellent stability at a lower price point.
Finally, note that many belt drive tables can have a stability problem if the belt is 40 years old/never replaced. Slack in a belt, failure to apply talcum powder to the belt and dried lubricant in the main thrust bearing of any turntable drive design can and will cause stability problems.