The Prime includes the following:

10 inch 3D arm
VTA Tower for VTA/SRA on the fly
Classic 20 pound platter and bearing
Outboard 300 RPM motor housing
New "Prime" feet which offer improved isolation and better mechanical grounding
Stainless Steel/Delrin record clamp
The Prime is also being offered as a package with the SDS, Synchronous Drive System.
The Turntable:

Chassis made of black textured vinyl over MDF with an 11 gauge steel plate bonded to the underside for the ultimate in resonance control and feedback rejection.
Four solid Delrin corner assemblies designed for isolation and mechanical grounding!! A first.
A 300 rpm 24 pole AC synchronous motor capable of high torque and quiet operation installed in a separate aluminum and steel machined assembly.
Inverted bearing - hardened stainless steel shaft, 60 Rockwell chrome hardened ball, spinning in a phosphor bronze bushing and sitting on a PEEK thrust disc. The belt side load is placed at the center of the spinning bearing for zero teeter-totter effects.
20 pound damped platter machined from 6061 aluminum to +/- .001” in a 39” circumference!!!
Motor pulley has an accuracy of +/- .0005” when leaving factory.
Wow and flutter: >.1%
Speed Accuracy: >.03%
Rumble: >85db down
Overall Dimensions 21 3/8" x 15 3/4"
Footprint is 19 1/2" x 13 3/4"
54 lbs packing weight
Available Upgrades:

Periphery Ring clamp for the ultimate in record warp reduction
HR-X Center Weight, perfectly complements the periphery clamp
Synchronous Drive System (SDS) for the utmost accuracy in motor speed and fine speed adjustments.
Single Motor Flywheel (must be used with SDS)