Well, I'd feel better doing 2 out of 3 rather than trying to figure which is the more accurate playback-- different audio system at least with the same BD. From the way you describe it seems the Polk sounds more like you'd expect from the onscreen action.
Or a different source (streamed copy...
Basic question -- what source are you playing the Aladdin scene -- stream. DVD. BD, ??
Is that the exact same source on your and your friends system?
Is there any other similar sound that is being suppressd -- cymbal crash or higher frequency sounds off a CD/LP/DVD?