Fund Overviews (TPG, KKR, Madison Dearborn)

Hi All,
Does anyone have any information on what differentiates these three funds or where you would look for such info? I am hoping to understand more about how they invest and what the associate experience is like at each fund. of course I am going to do the routine things (reach out to associates and more senior people at the firm, read about deals they did/news about the firm, and read the vault guide bios). Still, any I would love to hear any personal remarks or thoughts that anyone may have. Thank you!