hobart
I called the factory service guy for Miller to ask about what trouble they have - before I bought it. He's an independant warrantee station for several brands, including Lincoln.
He told me even though Miller owns Hobart, they are totally different machines.
The Hobart uses aluminum in their transformers, Miller uses copper.
most of his warranty repair in on Hobarts, he seldoms does a Milller.
The Hobart circuit boards are famous for burning up, - he even stocks them. The Millers seldom have circuitry problems.
He said the Hobart is the cheapie line, Miller the industrial line.
In his opinion Miller and Lincoln are both quality welders and will last a long time.
I bought the Miller 210 - love it!