Both are good machines, the Miller is a little more robust in some areas so to speak, since it's marketed towards industrial use, whereas the Hobart is geared more towards the home shop. Certain items like drive wheels and gears are metal on the Miller, whereas they're plastic on the Hobarts, at least they were a few years ago. If you're just looking for one for home use, I'm sure the Hobart would be fine, and you probably wouldn't notice a difference in using the two. But when I was looking for a 110 unit, I went with the Miller since I got a great deal on it, and I'd used Millers at work for years and really liked them.
Bob