I encode a track from cd to this 3 formats at 128kbps CBR.....and i noticed that Mp4 has more quality, following by Ogg, and then Mp3

Are my ears right ????

Sorry for the newbie question, i only want to have certainty of wich method is the best to encode my cds.

Thanks for any help

The best way to perform these kinds of tests is doing it blindly.

You would need this program:
http://ff123.net/abchr/abchr.html

And you can get info on how to perform such a test in this page:
http://ff123.net/training/training.html

The advantage os conducing a blind test is that you don't know which codec is which until you see the results, so there's no way of bias toward one or another format creeping in.