1Y/2Y trade-off

Dear Scott and Omari (as well as everyone else!),

I recently got my BA Hons cum laude at a top Italian university in business administrations, 3.9 GPA. I got hired from McKinsey as a business analyst and I'm really looking forward to an MBA in the US. in 2-3 years' time.

What I'd like to ask you is what the main points to consider are when contrasting one-year and two-year MBA programmes. It is obvious that a 2Y program will be more expensive in terms of fees and opportunity costs, but what does it provide you more than the 1Y one? The only thing that came in my mind so far is that 2Y is more suitable for people with no previous business education while 1Y may fit for business graduates. The thing is whereas all European MBAs (INSEAD, IMD, LBS) are one-year programmes, every Ultra Elite US curricula are two-year.

I'm still in the very early stage of my MBA strategy plan, but what I feel is that I'd like to attend a 2Y course. Nevertheless, I really need to know what it does give me more than its 1Y counterpart (apart from prolonged intellectual pleasure) in order to decide whether to look forward to e.g. Upenn, Stanford, Chicago & co. or to stick to Kellogg's 1Y/INSEAD - but I'd really like to cross the Ocean .

Thanks in advance,

Roberto