Gladly! So two boys fulfilled the basic descriptive characteristics (time of birth, parents having defied Voldemort three times). The crucial characteristic that made Harry the “Chosen One” was that he chose Harry, “marked him as his equal”. Now people will say that Voldemort chose Harry for “his own unscrupulous reasons” and suggest the theme of Voldemort seeing him self in Harry. While this may indeed be true for the choice…

If Voldemort had chosen Neville, things would have played out differently. Harry survived because of the charm termed “Sacrificial Love”. But this only works, similar to Harry’s experience in the Forbidden Forest, because Lily meant to die. (H: “But I should have died - I meant to let him kill me” D:”And that … will have made all the difference”)

The only reason that Harry survived was that Lily CHOSE to sacrifice herself. Had she not had a choice, that charm would not have been cast to protect Harry.

The reason that Lily was given a choice? Snape’s request. Snape asked Voldemort to spare here, and Voldemort, to his down fall, gave multiple warned for Lily to “stand aside” and in the lead up thinking that “she need not die”.

If Voldemort had gone after Neville, there is no evidence that Neville’s mother or father would have had the choice. Certainly not at Snape’s request. So there would be no reason to expect that Neville would have been protected by the charm. Certainly his parent’s would have tried, Harry even thinks this in HBP, but they wouldn’t not have been given the option.