Haas has a Global Management concentration program:
Undergraduate Program - International Study - Haas School of Business
You can be a PEIS major and take Haas classes. It's really your work experience and coursework that is important, not necessarily the degree.
That being said, the course offering structure at Haas is not conducive to studying abroad and although Berkeley has a lot of international students you don't really interact with them much unless you make an effort.
From what I see, USC Marshall has an in-built International Relations joint degree business program and is very encouraging of not just studying abroad but interning/working abroad. And it being a private school, it will naturally have a large international student population that you will probably have more interactions with.
ultimately boils down to your geographic preference and financial situation.