The music written for the Yoda-to-Imperial-fleet transitions was in both instances a loud statement of the Imperial March (not the concert version), which was replaced on the 35 with a spliced bit from the very beginning of the concert version, not as loud. The Bespin scene is the more objectionable edit as it drastically shortens and hacks together the music so that it cuts off as soon as Chewie begins firing on Slave 1, while the 70 allows it to run as composed, cutting off when the scene changes back to the lightsaber duel. It is better this way because we get to see a tortured Leia watching Fett's ship take off and hear the Han/Leia love theme in a similarly tortured rendition, whereas on the 35 the music has ended and we are left hanging with nothing but sound effects.
I grew up hearing the 35 on video and for the most part prefer it, but for the way the music plays out I would much rather have the 70. A combination of the two for just that would be the best ESB soundtrack in my opinion. OCP's classic edition tried to achieve this, but didn't get the music to run completely smoothly, which was unfortunately rather distracting.
I really like all the music for the original trilogy, so I kind of wish some alternate mix could put back in all the deleted cues too. But I wouldn't try to suppress the original either, because there is something to be said for leaving them out, from a certain point of view.