I thought that I had read at one point that Roddenberry's workprint, that was used to create the color/black & white version contained additional scenes that had not been included in the color master that was shown to NBC (and considering that workprint hasn't been touched since the 80's, are probably still on there), and were not part of the trims that had been lost in the 60's when The Menagerie was edited. It's to bad that CBS had not rescanned and presented the workprint in its original B&W on the Blu-Rays.
I have this print, courtesy of a Portugese VHS release. I'll copy across my observations from a previous post, but in short, no, the print is largely the same as the restored colour version we have:
Apart from the original Throne voice, there are two additional lines of dialogue. Vina's "probing, looking for weakness", in the picnic scene, prior to "tricking and punishing you", and Pike's "dya wanna gamble we won't?" just after the Keeper says "do you intend to destroy yourselves?" on the surface.
Also, there were some interesting differences/additions. I believe there were one or two slightly quicker cuts from one shot/scene to another (although you'd have to know your material inside out), and you get a real sense of scenes/dialogue finshing before moving on to the next. The "prefer...To starve" was noticably not abruptly interupted by the Keeper here, and in the Picnic Scene there are at least two instances of longer holds on Pike's reaction.
The most significantly longer scene was the final surface scene where some additional reaction shots were evidently removed for The Menagerie to quicken the pace and the dialogue between Pike and the Keeper. For example, a brief shot of the two Talosian advisors exiting the elevator; in the Menagerie they presumably exit when we focus on the characters/dialogue below, as Number One deactivates the laser explosion. One unseen reaction shot in particular by Vina, emphasises her sadness that Pike/the Enterprise was the Talosians' "last hope", it kinda makes the point that the Talosians are not evil, just misguided in their methods. We sadly lose this shot and a follow-up shot, in the Menagerie and subsequent colour reconstruction, and jump ahead to the next reaction shot to quicken the pace.
I think Vina's transformation and some reaction shots are slightly differently put together. I think it's all one shot of her here, but the last transition isn't as smooth, so I believe for The Menagerie, and later the colour restoration, they cut to the Keeper looking concerned at Pike, to eliminate that transition, before cutting straight back to Vina.
Music-wise, yep The Man Trap "soon begin the experiment" cue is not present, but I think we hold on Pike's reaction longer. The music cue for Vina's punishment begins earlier during Pike's "Which means they had to have more than one of each animal" to Vina, and the Going Up cue is edited differently and more basic, than the later restoration's smoother attempt.
Hope that helps!
