Perhaps the best comparison is what previous study books said:
He is also God’s “only-begotten” Son, in that he is the only one directly created by Jehovah God; all other things came into existence through him as God’s Chief Agent. (Truth, 1968)
This means that he was created before all the other spirit sons of God, and that he is the only one who was directly created by God. The Bible explains that this “firstborn” Son shared with Jehovah in creating all other things. Thus when God said, “Let us make man in our image,” he was talking to this Son. (Live Forever, 1982)
Jesus was called God’s “only-begotten Son” because Jehovah created him directly. As “the firstborn of all creation,” Jesus was then used by God to create all other things. (Knowledge, 1995)
He is the “only-begotten Son.” This means that Jesus is the only one directly created by God. Jesus is also the only one whom God used when He created all other things. (Bible Teach, 2005)
Jesus is also precious to Jehovah because he is the only one Jehovah created directly. That is why he is called the “only-begotten Son.” Jesus is also the only one Jehovah used to create all other things. (Teach Us, 2015)
The Bible refers to Jesus as God’s “only-begotten Son” because Jesus alone was directly created by Jehovah. Jesus worked closely with his Father, Jehovah, helping Him to create all other things. (Enjoy Life Forever, 2022)