Superiority of the Followers of Muhammad
90) Narrated Abu Sa'id Al-Khudri : Allah's Messenger said: On the Day of Resurrection, Nuh will be called. He will say: I do respond and am at Your pleasure, 0 Lord! Allah will ask: Did you convey Our Message of Monotheism to your people? Nuh will say: Yes. Then his nation will be asked: Did he convey the Divine Message to you? They will say: No warner came to us. Allah will say to Nuh : Who will bear witness in your favour? He will say: Muhammad and his followers. So they will all testify that he had conveyed the (Divine) Message (to his people). And the Messenger will also be a witness to you according to the Statement of Allah ''Thus We have made you [true Muslims - real believers of Islamic Monotheism, true followers of Prophet Muhammad and his Sunnah (legal ways)], ajust (and the best) nation, that you be witnesses over mankind and the Messenger (Muhammad will be witness upon you". (2:143)
(This Hadfth is sound and reported by Bukhari, Tirmidhi and Ibn Majah).
Once Muhammad is the most honoured Prophet, his nation (Ummah) is eventually the best Ummah that will enter Paradise first. In other words, they are the last Prophet's nation, but the first to enter Paradise. They are privileged, unlike the previous Ummah e.g. a sin of Muhammad's Ummah is counted one, but a virtue is counted ten for them.