Takish- The Mir and Rav Ilsin’s are two very different places. Need more specifics.
The bochrim in Rav Ilsin’s now are very similar to the hashkafic mindset of a good American Mir bochur.
Almost all the bochrim there have very strict halacha standards. The Yeshiva follows machmir shitos (like iber maysaring,and only using badatz food products). The bochrim treat halacha very seriously.