Is a naturalized citizen that went through the process of citizenship superior to a native born American by fact he/she actually pledged

One may make false pledges.

No, a naturalized citizen is not superior to a native born citizen. Whistle6 made a good point. One may make a false pledge. Not all but some do. On the other hand, a native born citizen is brought up and schooled in what it takes and means to obey the laws of the land and to be a good citizen. Not all but most know this.

What do you mean by superior and in what ways?

not necessarily