Having had my TSMGO remix trashed on here (lol!), I was immediately curious to see what you had done with it. It's certainly different, and far removed form the original version.
I have to admit, I found the 'Rising' remix a little repetitive, and I found myself listening to it, waiting for the song to start. Regretfully, it doesn't sell itself to me enough to invest the time to listen to the 12 minute version, assuming it's more of the same, but that's just my personal opinion.
Of the two, I prefer the guitar version, as it sounds like it could be a 'new' instrumental from Brian, which would always be welcome! :)
Both mixes are very professionally done, of course, and technically, as superb as ever. However, they're not quite to my personal taste, and I don't think that these will remain on my playlist as long as your Bohemian Rhapsody has done, which I still find astounding at every listen.
Lord, that 12 min. version is not that repetitive. You will find there more other parts of the original version. Only a bit different intro, but the middle of the mix and the ending is much extended and different from the 5 min. version :-)