I have a Century and use it quite often. It has never failed me. When I bought it 15 years ago the salesman (who I trust) of a large welding supply company said it was better because it has copper windings instead of aluminum. The duty time is a lot longer than the others at the time. Compare the duty cycle of each you are looking at, I know things have changed over the years since I bought mine. The good thing about aluminum windings it's lighter, mine is heavy.