From specifications, there is no way to tell which will sound better. And the one that sounds better to ME may not be the one that sounds better to you. They seem identical except for the type of case.
the gxt will likely get a bit louder, but otherwise its impossible to say which will sound better without hearing them in person.
I don't really need to sound loud, i need clean and high quality sound that's my criteria. I think that the vigor will sound better dunno why but it seems like this to me... maybe because the speakers are made from wood (?)
i doubt either of them are going to be "high quality" audio and more in the "mainstream pc audio" category. if you want true high end audio i'd be looking at hifi audio products but those are higher priced generally as well.