@Adit :
Spoiler:
Di beberapa mp3 player tertentu, kalo nyetel file VBR, volumenya bisa naek turun sendiri, jadi kalo dijelasin sederhana sih gini, kalo itu audio dibuka di software audio editing semacem Audacity ato semacemnya, kan ada peak level naek turun tuh, kalo CBR 320kbps, biar ndak ada nada, ato peaknya rendah, dia tetep makan tempat, dengan ngasi bitrate 320, padahal ngga guna, soalnya tiap peak level itu punya batas max bitratenya sendiri2.
Kalo di VBR, dia variable, otomatis menyesuaikan, jadi kalo peak rendah yah dia ambil max nya aja, misalnya max 224, brarti stop disitu, ga makan tempat, ntar di peak tinggi naek 320, dst.
Nah, karna Variabel itu menyesuaikan, suara kecil jadi jernih, soalnya dria bisa menyesuaikan sendiri~
Smoga paham

:
As for Free & Easy, which compression did you use for encoding the mp3?
Which syntax did you use?
How about the quality?
Those questions were so important, the way you encoding the file might be difference from me, I'm not saying that I know everything, but
syntax for encoding,
earphone did you use,
equalizer setting did you use is an important things to notice if you want to compare those 2 songs.
Or else, you still doesn't have a very sensitive ears, but I think you already notice the filesize difference, how about it?