Oops, should have said my smaller machine is a Miller 175 amp 230volt job. Smaller in duty cyle, voltage under load and realized power. The Lincoln 215 is a real jewel by comparison. But as to being better at body work and .025 wire you'd have to take into consideration the low end amps compared to the one you've got, voltage and other perfomance factors. I don't think there is any inherent qualities of the 120 volt feed that might make them better, no, not on a blanket basis.
Smaller in size, more convenient to find power and easier to move around probably. There may be one paricular unit out there that is just plain sweet in that gage of sheet metal tho. In fact I might sell my MM 175 if I can find such a critter new or used.