According to the Ariens site they had a naming convention that tells you what you want to know.
A model with a "d" in the name has a differential I.E. 926DLE - about
9HP,
26" swath,
Differential, comes with a
Light and has
Electric start.
In their explanation of the term "Discomatic" they describe 3 versions, Professional Duty, Deluxe and Compact. All refer to the method used to change the speed and direction that the traction system moves the unit, they are not part of the differential.
This message was modified Nov 18, 2008 by nibbler