There is a kind of continuity of groups or super-organisms {as Howard Bloom would call them}. In the recent world wars, no one from England would say they are fighting for Englishmen. No. Rather they would say they are, "Fighting for England."
Similarly you can notice a kind of continuity of the Mir Yeshiva over generations. A kind of DNA of an institution- rather that of the individuals that are a part of it. A kind of modesty, a commitment to whatever the Torah says -not to any doctrines per se, strictness about laws of money and not to speak lashon hara (slander).
But this, I think, can apply to almost all yeshivas built on the vision of the Gaon of Villna -the Gra.
Even for those of us that are not as strict in every detail that we ought to be , still it is important to have a good idea of what real, authentic Torah is-- as opposed to Torah of the Sitra Acha [Dark Side] which too often poses as the real thing.