If so what determines what their position is?
What is equal is that all human would see God from face to face. But Jesus made an implication that one could sit on either of his site. Are these place for special holy persons, like saints? On the other hand some persons go straight to Heaven and others will first go to purify themselves in the purgatory. So from that site one perhaps can expect that after purification every one is equal.
So is there a kind of hierarchy in Heaven, if so what determines it?
This is according to RCC.