Berkeley MPP here. GSPP is tops for policy analysis, not for overall policy school. GSPP faculty and administration say that the policy analysis ranking is the one that they care about really, but I'm not as convinced. I think that GSPP is a remarkable place but it's hard to deny that they are primarily connected to policy work in California. I would say that GSPP is definitely strongest in social policy and most of my classes were oriented towards discussions about poverty.
One important consideration for GSPP is the cost. By virtue of being public, it is much, much cheaper than most schools, even if you don't get funding. If you are a US citizen you are in-state after your first year (if originally from out of state). There is a professional fee but it is very low, an extra 4k a year. Furthermore, if you are willing to teach that waives in-state tuition and fees (but not out of state tuition and the professional fee), plus gives you enough to live on. So you can graduate GSPP with very low debt. They have very few scholarships -- usually about 1-2 per year. However, with the low cost, scholarships aren't as needed. My impression is that GSPP alums are less likely to work in private sector -- not that Deloitte etc don't recruit, which they do. However, Berkeley MPPs often work in foundations, non-profit groups, etc. WIth the lower debt burden you have several options when you graduate and don't need to be primarily concerned about paying off your loans, which was important to me.