I'm a mathematics PhD student looking for a postdoc position in the US, and I currently have two job offers:
Offer A is from a top department, but while they have some good researchers working in my field, they're certainly not the top researchers in that field.
Offer B is from a good but lesser ranked department, BUT they have one of the top researchers in my field (I would rank him among the top 3).
I tend to believe that I'll be equally productive in both places. Given this information, I have the following questions:
Which is going to be more helpful when I'll start looking for a tenure-track position: Having that top department being mentioned on my CV or having a good reference letter from that top researcher in the lesser ranked department?
Are there any other factors that I should consider when I choose between the offers?