I haven't reupped at Fanduel this season, didnt realize they dropped the K.FanDuel dropped the K this year. They are nearly identical these days, DK is full PPR while FanDuel is half PPR, DK has bonuses for 100 yard rushing/receiving and 300 passing games, FD has larger deductions on turnovers.
I play at both, but prefer FD likely only because I started there and have won more there.