I rip a lot of MP3s, I always do VBR (Varial Bitrate) highest quality setting. They always come out fantastic. My question is, when you get a MP3 from somewhere on the internet, let's say you get two versions a 192 CBR and a 320 CBR or VBR. Sometimes the 192 version will sound better, more fuller, and louder. And it will be approx 3MB less in size. Is this due to the CD that it came from, or the ripping software that was used or something?