I'm going to be a dissenting voice and say I wouldn't be surprised if Kerfoot ends up being the better player.
It's very early days, and I'll be first to admit that I fully expected Kerfoot to be very mediocre and eventually a cap casualty, but Kerfoot plays with a kind of jam shift to shift that Kadri was supposed to, but didn't always.
He seems to have a more consistent motor, surprisingly gets into greasy areas, and has a crisp heads up game. That compared to Kadri's darting, sometimes floating and unfocused game. He's also cheaper and quite a bit younger. He seems to have a good low center of gravity and is pretty balanced out there, great straight ahead speed and agility whereas Kadri always looked light on his feet, darting and under powered. Probably doesn't have the hands Kadri does.