If you look at the Hobart & Miller 140 amp Mig units they look all most the same. The sales man at the shop I buy my gases at said that they are made in the same factory. If you look at the miller on the wire feed and the amp control they are variable. On the Hobart unit they are preset on the controls so you can't slide in between whats on the dial. I have the miller unit and have had no problems and I use this unit all of the time because of its portability. I think if you are going to use it a lot I would go with the miller or the lincoln 140 unit. The shop that I bought my welder at sells all 3 units and I noticed the Hobart unit felt much lighter when I lifted it.
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