It seems like an auditory illusion to me. When I listen to them consecutively the first clip sounds better to me; more clarity, more open, and less compressed then the second clip. However, if I jump back and forth to the same spot in each clip they sound the same to me. I believe it may be because the clips seem to end on higher frequencies than they start, so the beginning of the second clip appears to sound a little duller and more compressed when compared to the end of the first clip. But, when I jump back and forth to when they should be playing the same frequencies they sound the same to me.