Hey emanuelebormida -
We always tell people that this is a very personal decision and it comes down to so many factors - career goals and school specialization, culture and fit, recruiting opportunities... These are both good schools for sure. However, we **really** like IE based on our experiences with them. It is a more selective school and they're working to push the envelope with their programs, at least on the MBA side. We're assuming that it's the same story with them in the MiM department too. We simply don't have enough firsthand experience with Cranfield to offer the same level of enthusiasm; we don't see that many people who are targeting them so we just don't know. We do know that they're a quality institution so this comment is in no way dissing Cranfield; we're just saying that we really like IE!!
There's many many angles to explore of course and as we said, it's a very individual decision. From your handle it looks like maybe you're Spanish, in which case, going to school outside your home country could be a very good experience that opens doors. Certainly the economy in Spain isn't the greatest, right? It all depends on what you want out of the education and what type of opportunities you intend to pursue from there.
You can't go wrong with either!
Please come back and let us know what you end up deciding.
EssaySnark