Well, when I researched welders, I of course checked out Miller and Lincoln. But when Iw as reading, I kept finding forum posts and such about Century. From what I could find is that they ( and most welders) are made in the same factory and just brand different names. Some century models built by Miller an some by Lincoln.
I read a lot of posts, made by people who claim to have been welding for many years and choose Century over the bigger names as well.