I've owned both, and I think they both have their strengths. Even though the Millermatic 211 is dual voltage which gives off the idea it's portable, but they are way too heavy to lug around a job site. It's not something you want to carry around. The Imig 200 is lighter, and after you add a spool of wire its heavy, but you can lug it around a job site. The millermatic 211 pulls more power than the Imig 211, not sure how much, but there are considerable differences between the two when I rand them off my generator. I do not own a spool gun so I can't tell you much about that. The 211 will only run one particular aws number aluminum wire. I did attempt that once, and I bought the wrong wire; it would not weld. I had good luck with both welders and can't say anything bad about either one. I have read where people had trouble with their millermtic 211 even some D.O.A. issues (imagine that!). Everlast is the more portable of the two welders.