Clive or Dion?

(Xposted from r/mtg) Been getting into the FF cards pretty heavily since my return to the game, fell in love with and bought a borderless Clive, Ifrit's Dominant and wanted to build a deck around it but now that I've pulled a Dion, Bahamut's Dominant I kinda think it'll be easier/better to build a knight deck, thoughts?
For context, I haven't started either build yet. Since I don't really have a collection yet outside of precons that I'm not ready to admin, I'm waiting on the booster box I ordered to arrive today to start in earnest.