Parson is not like Ender.
For the simple reason that Parson is not a child.
Ender's game is completly focused on the fact that ender is a child. That he is a brilliant mind, with a child's morals in a child's body.
Parson comes from a world with a mind possessing the exact opposite - the maturity of real life.
Ender is a genius with a child's understanding, thrust into an adult's world with adults pulling the strings.
Parson is a genius with a regular person's understanding of ethics and Morales, and thrust into a cartoon world of fantasy.
Stories are not parallel at all.
Even looking at the endgame, parson used a scorch and burn.
Ender just dropped a bomb of anhillation on his enemy.
Even their strategies are different. Ender is not the best strategist in Ender's game universe. Bean is. Ender is *almost* a good a military thinker as Bean, being able to come to the same conclusions much of the time. But Ender has to work for it, and to Bean he virtually breathes in strategy and blows out godly battle plans. Ender's true strength, that makes him greater than bean is his ability to connect with and fully utilize his commanders. He is capable of understanding the minds of others, and putting them in positions which pefectly suit them. If ender had failed and it had come down to bean leading, it would have been harder to win because it would be Ender's extremly good strategy excuted by perfect commanders vs Bean's nigh perfect strategy executed by good commanders. Ender was all about the human element, how to use extremly good people to maximum potency.
This is much clearer in Ender's shadow and seqaules.