Well, let’s compare bad apples with worse apples: Is a man who commits adultery with a woman on a different level of sin, from a man who commits adultery with another man? I would argue that yes, the homosexual crime is worse than the opposite-sex crime, because one is different by way of the additional sin of homosexuality, going against God’s design and intention in the created gift of sexual union.
St. Paul is certainly not arguing “equivalence” of sin, in his teachings
Rom 1:22 Claiming to be wise, they became fools,
Rom 1:23 and exchanged the glory of the immortal God for images resembling mortal man or birds or animals or reptiles.
Rom 1:24 Therefore God gave them up in the lusts of their hearts to impurity, to the dishonoring of their bodies among themselves,
Rom 1:25 because they exchanged the truth about God for a lie and worshiped and served the creature rather than the Creator, who is blessed for ever! Amen.
Rom 1:26 For this reason God gave them up to dishonorable passions. Their women exchanged natural relations for unnatural,
Rom 1:27 and the men likewise gave up natural relations with women and were consumed with passion for one another, men committing shameless acts with men and receiving in their own persons the due penalty for their error.
Rom 1:28 And since they did not see fit to acknowledge God, God gave them up to a base mind and to improper conduct.
Rom 1:29 They were filled with all manner of wickedness, evil, covetousness, malice. Full of envy, murder, strife, deceit, malignity, they are gossips,
Rom 1:30 slanderers, haters of God, insolent, haughty, boastful, inventors of evil, disobedient to parents,
Rom 1:31 foolish, faithless, heartless, ruthless.
Rom 1:32 Though they know God’s decree that those who do such things deserve to die, they not only do them but approve those who practice them.