so nothing to do with one being ac the other dc, the availability of different filler metals and the different temperatures involved or the fact that the filler wire with the mig is used to deliver the current whereas tig uses a tungsten electrode.
there are other differences but i haven't the time to phone my old man and ask (he used to be a welding demonstrator/technician)
"Advantages of tig would be the pretty weld."
so nothing to do with one being ac the other dc, the availability of different filler metals and the different temperatures involved or the fact that the filler wire with the mig is used to deliver the current whereas tig uses a tungsten electrode.
there are other differences but i haven't the time to phone my old man and ask (he used to be a welding demonstrator/technician)