Don't know. I just know I tried it to see if it will still work with the Cydia plug in and it does. I do not notice anything new with this updateDo you know what the update is for? Is it just to update the blocking for jb devices?
I did the update on my iPad and left the other version in iTunes. If I could not get the update to work I would just delete it from my iPad and reinstall the older version from iTunes