^ I have. Unfortunately in the process I found that my receiver will only fully pass 96kHz sampling rate multi-channel audio if a mode that bypasses most of the room correction processing is used. With THX mode engaged, the audio is downsampled to 48kHz somewhere before the DACs.
I also don't have any good way of doing a quick A/B comparison. All that being said, on my first playing of the 96kHz Dolby TrueHD track, I noticed details in the soundtrack that I don't recall hearing before. The one I specifically recall is during the "Somewhere on the road from San Diego" scene when Trudy leans against Gordo, I had never previously discerned the "and the fuse is lit" line from the source music. I put the 48kHz disc back in and listened to the same spot in it. The difference is subtle enough that I'm not completely certain of a difference, but it does seem to me that these lyrics are just a bit more defined on the 96kHz version. I can't tell any difference in high level audio, but mid to low level audio seems a bit more detailed as evidenced by my noticing details that I don't recall noticing before in many listenings.
I really think the audio on both versions sounds spectacular. It's a shame that the original master tapes for Bill Conti's score are apparently missing, with the exception of the master for the LP that was intended to be released in 1983 but ended up being the master for the CD released in 2009 instead.