What is better: AAC or QMusic Pro audio codecs

in iPod + iTunes + AppleTV edited January 2014

I have a couple of questions for audiophiles:

Q. What audio codec produces better audio output quality?

a) AAC

b) QMusic Pro (v2)

(I know that QMusic codec is hugely better than MP3, so I am excluding this audio codec).

Q. What video codec produces better video output quality for QT?

a) Sorensen 3 (developer)

b) MPEG-4 (which is more universal)

Thanks for your thoughts on this.
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