OK, I may have a stricter interpretation of the word "backup" than others, so I define making a "backup" of a music CD to be take the music CD and a blank CD-R and copy the music CD to the Blank CD-R and that's all. If you are performing a backup as I described above, I prefer to use Clone CD because it is one of the quicker programs to use, that I have, when you clock it from the first double click to open CloneCD to when you have a completed backup of a music CD (haven't compared it to Alcohol because Alchy is having a hard time with my system config. and I don't use BW because of the arrogance of their people).
I only use EAC when I am making a compilation CD or am trying to fill in the empty space at the end of the CD-R with additional music. Most of the time, though, I am making a quick backup to takealong on a trip or something, so speed is more important for me.