Essentially going from experience of their releases, I can only say this:
With regards to the Pet Sounds MoFi CD, even in the version I have 'acquired', it sounds even better than the ever great Mark Linnett stereo mix - the EQ on the track is absolutely perfect, allowing each little nuance to truly become audible even in ways the Pet Sounds Sessions box cannot achieve [the only other PS stereo mix I own]. Equally, this is the greatest version for the dynamic range too - here it is compared to the still very dynamic 2012 remaster from MiC, with both tracks amplified to peak at 0dB for easy comparison:
However, both these things are not factors you are going to notice without significant enough equipment [to an extent]. It doesn't have to be anything spectacular, but obviously the better your audio setup to more you will benefit from these releases.
With regards to Vinyl, I haven't heard any of The Beach Boys releases myself, but I do own the Weezer MoFi catalogue on vinyl, and all 5 of these releases sound incredible, though don't forget the original releases of these would have far more dynamic range compression on them that most Beach Boys releases.