Kat Or Leblanc?

Leblanc you can get fed but you can only remove 1 person in a teamfight at a time. If your laning phase is flaweless you should go for Katarina, and snowball as much as you can. Its better to be able to delete many people then just one or 2 at a time.

Katarina is better at team fighting than Leblanc.

Katarina can carry harder but has so many weaknesses, leblanc can insta kill an adc