The G-Major actually has a faster processor in it, since it is quite a bit newer. The G-Major, however, has A LOT more effects, parameters, and control options. I don't think either would be any more durable than the other, and TC Electronic units always have flawless sound quality. My Triaxis Rig originally had a G-Force. It was awesome sounding and a tweaker's delight. I sold it for a flat grand and replaced it with a G-Major for about $450. While cool, I didn't use most of the options the G-Force had to offer, so the G-Major had many of the same great sounds in a slimmed down format. I took the money I saved and retubed my Triaxis and 2:90, and I had money left over when it was all said and done. I've since gone back to a head and old school pedalboard, but that rig did sound fantastic.