Nope. Individually, no one was blessed with anything that anyone else didn't have. But, again, it's not like this question is new. In Jesus' day, his disciples asked about a man born blind, who did sin, this man (obviously before birth) or his parents? It's not a new question. Jesus healed that man, saying that neither sinned or neither was so "worthy" that these things occurred, but to show forth the glory of God (in healing the infirmity.
We see the man's blindness as his affliction, but the reality is, mortality or our mortal nature is an affliction. We all have need to be healed and only one person can do that. The Savior's ability to heal is not limited to just the blind, but rather to all who receive him. It is obvious that judgment is not immediate upon death. That would be unjust because of the billions upon billions that have never heard the gospel much less given an opportunity to receive it. This opens the door for Christ's saving grace to impact all of God's children (which includes everyone who has ever lived or ever will live on this earth). Now consider who has the greater reward, those who lived without the law, but later received Christ after death or those who had the law but didn't receive Christ?
In this vein, I suspect that the blind man received the greater blessing. Those who did not have the gospel will not experience the wrath that those who did. Your idea of greater rewards has nothing to do with our teachings. Even those who were born in the covenant but didn't live it for whatever reason will have an opportunity to receive just as those who were once disobedient in the days of Noah. Nevertheless, those who will not live the gospel cannot have the blessings of the gospel. No one was predestinated to be saved. We all started in the same place and from there we have to work out our own salvation. Even the chosen could fall. The heavens lament over the fall of Satan who was once called a prince of the morning. He was among the great and noble ones, so don't think that being in that group grants anyone special exceptions or that they have no choice over the direction their life is heading.
Remember, in our religion, the greatest rewards are available to everyone, whether it be the prophet or the deacon, the Muslim or the Hindu. If they keep the commandments they will have life. As I pointed out in several posts, receiving Christ can come at any time and everyone will be granted that opportunity and be taught the gospel, whether in this life or the next, if they receive Christ, the greatest of all blessings will be theirs. According to the scriptures, they will be judged in the flesh, they will live in the spirit the way God does (1 Peter 4:6).
That tells me that those who keep the commandments but did not know Christ only have but to receive Christ to obtain exaltation and we, latter-day saints, get to be part of that by providing the ordinances they could not obtain for themselves because they did not have them. That is how we become saviors on mount zion.