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I don't have my own views to share about resurrected boy vs. mortal body but can share with you the views of Scripture:
"Do you not know that your body is the temple of the Holy Spirit" - hence our current mortal body is to be regarded as the very dwelling place of God and treated with the utmost respect and dignity as the "place" where God Himself not only dwells on earth in us but also the "place" through which others come to meet our Lord. When we who believe in Jesus Christ eat too much and make our bodies fat or we smoke or we put drugs or too much drink in our bodies we dishonor the dwelling place of God Himself. Our mortal bodies are wonderful works of God - "behold how fearful and wonderful are all thy works" - we were formed in respect to our bodies by God in that secret place - Psalm 139.

Now our bodies are corrupted by the sin of our first parents and then by our own sin - so they will die since these bodies were not kept 100% pure by our pure thoughts and pure pure deeds - Adam and we have corrupted them and our souls will be wrenched apart from them until they are totally destroyed or transformed (those who remain will have this mortal body transformed in a twinkling of an eye).

The resurrected body is the SAME body as the mortal body except it is glorifed - i.e. made perfect for our perfected souls. That resurrected body will be like Christ's resurrected body in the sense that it is 100% pure and undefiled and will remain so forever.

Those who trouble over the scientific fact that our bodies when they are buried or burned or decayed have their molecular structure undone and then our atoms become absorbed into other things in the creation forget that God remembers exactly how He made our DNA and what we ought to be like in respect to our bodies. So when the resurrection takes place each and every atom that was us regardless of where it has gone or what has become of it - has a unique identity in God's mind that has to do with each person and it is not impossible for Him to raise up our bodies in respect to the atoms into which they have been dissolved - even if one of our atoms has become some how the part of another person's body through that person eating a plant that has absorbed a part of us - it is the historical continuity of each person in respect to body and soul that is testified to in the Scriptures because God keeps track of each and every part of us 'the hairs of our heads are numbered'. Don't ask me or anyone HOW God can do this - does He clone atoms so that an atom what once made up my body then is recycled to make up someone else's body is used to resurrect both our bodies? I don't think we need to know or think about such things - God is all powerful and all wise and knows how to cause this resurrection He has promised will happen.

Our resurrected bodies will be perfect matches for our perfected souls.