Yugoslavia on the other hand, was more interesting, in the sense that it was not a part of the Warsaw pact, or a puppet state under the USSR. It was a 'non-aligned' communist state, and, after Stalin's death had passable relations with both the East and the West.
In '68 some Jewish-origin Poles were handed passports and one way tickets if they pleased (https://en.wikipedia.org/wiki/1968_Polish_political_crisis#E...).
Again, ppl were technically allowed to leave the USSR (and East Germany too). But it might take 10 years and you were a social pariah in the meantime.
You could leave the GDR - but you had to wait for the permit for several years and your ability to earn an income was severely restricted during that period; In the USSR Jews could apply for emigration since the seventies, and permission was very dependent on the current political climate and the whims of the higher ups.