It really depends.
I tend to prefer releases sourced from the original stereo mixes than new mixes from multitracks because it is very difficult to achieve the same balance on the new mixes that match the sound of the music in the original mix.
After releasing Young Sherlock Holmes from multitracks remixes Intrada returned to the original mix for their latest edition, and it sounds better IMO. LLL did the same when they rereleased Cliffhanger (Intrada had a new mix from multitracks and LLL returned to the original stereo mixes).
Other multitracks that I remember being criticized were Condorman (sounds good to me, but not being familiar with the original mix I can not compare) and Conan (the new mix sound a bit off to me, maybe in the future they can attempt a new mix trying to bring the sound closer to the mix/equalization of the original LP).
One score that I'd love to see rereleased from the original stereo mix (like YSH) is Psycho II. The complete Intrada release is great and it was one of my most wanted grails, but the mix from the multitracks has still some issues to me (mainly with the synths being more to the front and the piano more to the background - comparing the End Titles of the original LP/CD to the complete edition makes this very clear), I'd triple dip on this one if it was rereleased from the original stereo mix. Here is a short comparison between the two mixes:
https://youtu.be/d7Cx1sqIghUOn the other hand the new mulitracks remixes for Warlock and Last Starfighter are so much better than previous releases that when they can get multitracks remixes right they can achieve fantastic results (as they are the 1st gen elements). Jaws The Revenge uses the original stereo mixes that are a bit hissi, this is a case on which I'd love if one day we get a new mix from multitracks to see if the sound could be improved.