I can tell you this. The Crown DC truck is about as good as you can get for holding up in cold strorage. The Crown AC truck has only been out 2 or 3 years, and as a tech, I have had no experiece with the AC truck in cold storage. I have heard that the motor contollers on the Raymond AC trucks had problems handling the moisture in a freezer, and Crown and Raymond were using AC motor controllers from the same supplier.

Hope this helps