The Virgin Mary āwas preserved from all stain of original sin and by a special grace of God committed no sin of any kind during her whole earthly life.ā (Catechism of the Catholic Church, 411)
Jesus Christ, with respect to his human nature, was a pure man, conceived without Original Sin and never committing a personal sin. In the same way, the Virgin Mary was a pure woman, conceived without Original Sin and never committing a personal sin. So, Yes; with respect to his human nature, Jesus Christ and the Virgin Mary were/are on par with each other. Of course, with respect to his divine nature, Jesus Christ, as God, is infinitely superior to the Virgin Mary, a mere creature.
Because Jesus Christ, with respect to his human nature, was/is a pure man, he is sometimes called the second Adam. (See 1 Corinthians 20:21-22, 45, 47.) Similarly, because the Virgin Mary was/is a pure woman, she is sometimes called the second Eve. It is quite beautiful really; as mankindās Fall was due to the sinful disobedience of the first Adam and first Eve, mankindās salvation was achieved through the sinless obedience of the second Adam and the second Eve, Jesus Christ and the Virgin Mary. (The Virgin Maryās fiat made the Incarnation of the God-man, Jesus Christ, possible and his subsequent death on the Cross won our salvation.)
St. Justin Martyr (A.D. 155) contrasts the obedience of the Virgin Mary to the disobedience of Eve. (Dialog with Trypho, Chap. 100.) St. Irenaeus of Lyon (A.D. 189) develops this theme a little more. He refers to the Virgin Mary as the patroness (advocata) of Eve. He says that the human race, which fell into bondage to death by means of a virgin (Eve), was rescued by a virgin (Mary). (Against Heresies, Book 5; Chap. 19.) In another place, he says, āAnd thus also it was that the knot of Eveās disobedience was loosed by the obedience of Mary. For what the virgin Eve had bound fast through unbelief, this did the virgin Mary set free through faith.ā (Against Heresies, Book 3;Chap. 22.)