I agree with Raul that a coreless motor, executed to the level of excellence of the iron core motor in the Mk3, would in theory be superior for the job of driving a platter. However, Raul's additional contention that the Mk3 platter, all 21 lbs of it, is subject to "ringing", is absurd on its face. It weighs 21 lbs! It is made of stainless, brass, and iron all bonded together powerfully and therefore benefits from CLD. Any solid object will resonate at some frequency or other if hit with a mallet, but the notion that the Mk3 platter, among all turntable platters in the world, is particularly subject to ringing is.... (I guess I already said... absurd.)
Time, and some intrepid pioneer who listens to both turntables side by side, will eventually tell us if the SP10R really has a leg up on the SP10 Mk3. My guess is that the Mk3 is already operating at such a high level (in the DD pantheon) that discerning whether the 10R is really superior is going to be like arguing the number of angels that can dance on the head of a pin. (Siri knows this, if you've ever asked her.)
Time, and some intrepid pioneer who listens to both turntables side by side, will eventually tell us if the SP10R really has a leg up on the SP10 Mk3. My guess is that the Mk3 is already operating at such a high level (in the DD pantheon) that discerning whether the 10R is really superior is going to be like arguing the number of angels that can dance on the head of a pin. (Siri knows this, if you've ever asked her.)