Yeshua1 my friend,
Given Jesus is sinless, that implies that he was and is different than the rest of us humans.
Adam was a son of God but still sinned for instance, as did many angels who are the sons of God. Jesus is different even than angels and Adam, who was arguably a kind of angelic being being a direct son of God. Jesus is without sin in a way foreign to all other beings we have come to know here on earth save Yahweh and His Holy Spirit. The three combined are the Godhead. Again what exactly makes him so foreign to us as created beings is a deep mystery it seems we will pierce at death.
Although, I do want to add that if we use the term sin nature we must be careful. I recognize my sinful state primarily in my temptations and failures. Jesus never failed, which denotes his lack of a similar sin nature, but he was tempted. Temptation being an aspect of sin that the Son knows well. The bible says Yahweh cannot be tempted (James 1:13), but Jesus can and was tempted, yet resisted the evil one completely (Matthew 4:1-11, Luke 4:1-13, Hebrews 2:18, Hebrews 4:15). This is apparently good news, according to the bible, as Jesus can empathize with us in our own temptations and help us out of them.
My question to you is "what do you mean by sin nature exactly?" Then I can search the scriptures more purposely.
I mean if you mean Jesus was without the ability to commit acts of sin, I must agree. We will be sinless like him one day when we are in his presence (1 John 3:2). However, if you say that Jesus was not under the curses of Genesis, then I must disagree, because Jesus toiled for one as a carpenter for probably close to two decades.