Do you mean the PM-30 mill ?

I looked up the cx601 and it is a Weiss 30 mill. The older ones had a two speed gear box and a brushed DC motor and the listings says the Cx601 has two speds with a knob.. The new PM-30 has a belt drive and brushless motor which many think is a better system. it also has a higher top speed of 3K

The rest is the same mill.