I enjoyed Rajini's dialogue because I witnessed it first hand, early morning show amidst sold out crowd aka fans. That experience is indescribable.
I've only heard the Zero dialogue from the promos. It was just fine, fun.
These two are very different dialogues evoking completely different response/emotion. While one played out to the masses, Shah Rukh's one will aim to be more funny than match a superstar's attitude. And here it's the character Bauua speaking that line. The whole idea is to convey this character doesn't need anybody's sympathy & that he spreads happiness across with his joyful take on life. The emotion is more subtle & solely character driven.
In case of 2.0, though it's Chitti saying that & real Rajini wouldn't say that. It was the fan in Shankar making Rajini's character say the line so that the fans can take it as their pride. the cheers, whistles & non-stop claps were the result of that.