Tina Fey, Bossypants
Amy Poehler, Yes Please
The remarkable thing about Tina Fey: she will give lots of individual details and tell stories about her family members and her child, and you will be left with exactly zero information about them, an act of obfuscation that is very impressive. Amy Poehler says she doesn't want to get into the details of her personal life but inadvertently reveals a lot: the basic dimensions of what happened between her and Will Arnett that led to their divorce are clear. Fey's method is more cerebral and she is clearly a better writer--better not so much because her jokes are funnier, more because she understands very well what a joke needs to be surrounded by--while Poehler seems like the best possible person to work with.