The finale of the MTT/SFS recording sounds on 'auto pilot' to me. I don't think he really liked it, or got 'into it' very much. More than anything, it really bugs me that they totally disregard the "muted" marking for the snare drum at the very spot where the third hammer blow exists in the first version. That undermines the whole point of that very moment. It's usually muted by simply switching the snares off. Instead, they play it quite loudly with the snares on.
Furthermore, you can get the effect of a mini hammer stroke, just by placing an accent at the start of the snare drum roll, with the snares turned off. It works very well.
For me, MTT's slow movement is turned into a sappy Adagio, which it ain't, while the scherzo is just there - nothing frightening or spooky about it. Again - just for me - it's a complete non starter. If I wanted a newer recording with an American orchestra, I would reach for Eshenbach/Philly, J. van Zweden/Dallas (a low level recording that needs to be turned way up [then it sounds great]), or even Vaenska/Minnesota.
If Chicago were a must (they never seem to do M6 all that great), I would rank them Abbado, Solti, then Haitink.