While the same motor is used, the way it is mounted is entirely different. The motor in the DC used a system that worked well for isolation, basically hanging the motor on what looked like small rubber bands. EVO takes things to a whole new level. First, the motor gets a big round steel shield over the top of it to prevent any electrical energy from interfering with what the cartridge is picking up. Then, they mount the motor to this shield, which is mounted to the plinth using TPE isolation washers on both the top and bottom of the plate. Motors always make some kind of vibration and this system keeps those vibrations from getting transferred through the plinth and back into your stylus.
A lot of this tech came from their much more expensive X1 turntable and it is very impressive to see it in a turntable that is under $500
Motor Speed Control
On the DC, switching from 33 to 45 involved taking off the platter and moving the belt. The EVO has a new electronic speed control that not only makes it just the flip of a switch to go from 33 to 45, but also provides a more stable signal to the motor, resulting in more consistent speed.
Inner Platter and Platter Bearing
These appear to be the same to us on both the DC and EVO.
One of the few complaints we ever had about the DC was the stamped steel platter had no damping. If you tap it, it would ring a bit. The new EVO uses a slightly thicker stamped steel platter with a large TPE damping ring around the inner perimeter. It weighs in at almost 4 pounds with the TPE ring added. This change is huge! You get a better flywheel effect and there is less chance of the platter vibrating with the sound from your speakers.