- Stronger kit overall.
- Q brings him and his target closer together, can also serve as an escape tool
- W negates damage, scales off his hp, and allows him to do more damage
- E is an AOE slow that does damage
- R is a point and click hard engage tool
- Passive lets him do extra damage and stun off his auto
- You go in, you may not get out
- Q is an AA reset that stuns her target
- W does an AOE burst after 3 seconds, during which she gets a buff on her armor and magic resist, and the duration extends another 3 seconds if it impacts a target
- E is a limited AOE, linear skillshot that temporarily roots her target and dashes Leona to her if its an enemy champion which can also be used to juke around fights
- R serves as a double edge sword for her as a Support.
I can write a book about playing Leona Support, Top, Jungle, Mid, AP, AD, Tank, Utility, and Hybrid. My opinions are biased in that given the choice between the two, if you have the experience and skill, I'd say go with Leona. However, Naut, in general, is just better. Different, but better.