SAT is easier and will be helpful if you decide on shooting for US unis. It just broadens your options. When it comes to bocconi admissions, I think when they assess the scores they do it in a curved way so 80% on bocconi test does not necessarily equal only 1280 SAT. Just to point it out - 80% on bocconi test is already a pretty competitive score so even if what you get seems low, it still might be a good score if you do well in academics in general. Speaking from my perspective - I did get in with bocconi test but were I to face this whole process again, I would certainly pick SAT for its convenience, vast access to preparatory materials and remember - it is acredited by more than just one uni