im looking into stick welders and am wondering whats the diffrence between the Hobart Stickmate AC/DC Welder — LX235 230 Volt, 235 Amp and the miller Thunderbolt® XL 225/150 AC/DC and 300/200 AC/DC other then color and price i have a hh140 and am very happy with it and hobart just wondering if miller is worth the extra cash thanks