Could be c't magazine accidentally played the mp3 version louder. Human's have a known preference for louder music, and will tend to prefer louder samples over

Could be c't magazine accidentally played the mp3 version louder. Human's have a known preference for louder music, and will tend to prefer louder samples over quieter samples. Rumor in the industry is that this was a trick MS used to try to push the WMA format, that they encoded some WMA samples used in some publicized tests at +3dB above the source sample.