You asked a very similar question a while back (I don't have that good a memory, but I searched for that thread to refer to in this one!): https://forums.oracle.com/message/10877200#10877200
My first guess would be 'all #Missing' upper-level blocks in one or other cube. You haven't said which one has more, incidentally. But if they reconcile, and a forced restructure in both environments brings the counts into alignment I doubt you have a problem.
Thanks Tim. The environment which I am importing had less blocks than the imported. I was under the wrong assumption that import and export between same version of EPM will be same.
No problem! That makes sense, then. The thing is that the export does not contain those all #Missing blocks (if it was an all-levels export). Or there are all #Missing upper-level blocks that were cleared at some point along with their input-level data and these didn't get recreated by the calculations. Either way, if your cubes reconcile I would not worry.