Says the man who's English is like that of an infant.
Anyway, regarding Kearney. I'm not saying that he's a better full back than Medard, but I'd certainly put him up there in the elite bracket of European 15's, along with Foden. He's got an absolutely massive boot, is unrivalled in the air and has some pretty nice distribution skills. He used to be a pretty good offensive threat before he bulked up, much like his brother is at the moment. That said, that element of his game has certainly improved under Joe Schmidt.
I think he needs to work pretty hard of his tackling and try to become a bit more of an elusive runner, but aside for that he's top notch.