For the non-Calvinist, why did you choose to believe while your neighbor rejected the gospel message. What about you is different? Are you wiser? More humble? Or some other reason?
The assumption is being forced here that a choice can only be different because a person is fundamentally different. The meaning of free will is that two people with the exact same agency can be free by reason of only that agency to choose different things. The reason for the choice is the agency of the will itself, the function of decision-making ability endowed by God.
There is in fact no necessary logical connection between a righteous result and a preceding righteous nature, until it is forced upon the equation by asserting a non-sequitur of a conclusion: any righteous result means the person is more inherently righteous. This is false. Non-meritorious actions logically exist, where the result cannot be tied up with the reason for the choice.
Wisdom and humility may be virtues instead of vices, but they don't contain within them inherent righteousness, and are gifts from God. This is why King Saul can tell David he was a more righteous man than he was without actually appealing to David's self-righteousness as the reason, or why people can do things that are declared righteous without violating the need for grace.
If humility were an inherently righteous thing, the mere act of admitting one was wicked would immediately make them righteous, with no need for atonement at all. Once we see the incorrect presuppositions being smuggled into the question itself, the objection completely dissolves: a wicked person can make a better decision without it making them more inherently righteous in nature.