I was mostly skeptical about the whole mono reissue thing until this box was released. Dylan's music from this era is particularly well-suited for mono.
That said--if one is seeking mono mixes that supposedly sound radically different from the stereo mixes (different overdubs/vocal takes, etc.) there's really none of that here.
There is also a mono Dylan comp which came out at the same time as the mono box
https://www.amazon.com/dp/dp/B0041OJ0WU/?tag=imwan-20