I can only speak about Elrod Machine.
I drove down from Colorado to Flagstaff and spent an afternoon at Elrod machine. The Staff there really does know there stuff. There products have had years of refinement to be the best they can be. The materials used are all first class.
I was there hunting down options for retrofitting an Acer mill for my prior employer. I did recommend the Elrod unit, but the conversion did not go forward since the Acer was considered surplus in this economy.