*Jesus came into this world as God and as a human.
**Jesus was without sin in His nature and in His behavior.
*Adam was created in the likeness of God and he was also created without a sinful nature.
**Jesus was born into this world as a man (human), in the likeness of the heavenly Father and without a sinful nature.
*Adam, though he was created without sin, chose to sin.
**Jesus, though He was born with a human nature, but not a sinful nature, chose not to sin.
*Jesus as a man was without sin in His birth, without sin during His earthly life, was without sin in His sacrificial death, physical resurrection and ascension.
**Jesus was without sin as a man, because He loved the Father and He chose to obey the Father.
The Lord willing, I hope to address the subjects of homoousios (same nature [as God]) and homoiousios (similar nature [as God]), and non posse peccare (not possible to sin or, not able to sin) and posse non peccare (possible to not sin, able to not sin), as it relates to Jesus as a man being sinless.
Jesus (the man) was, is and will forever be sinless.
1 Timothy 3:16
16 And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.