All sins are ulimtately forgiven through the Cross (except the sin of blaspehemy against the Holy Spirit). So in terms of justification, there is no distinction. But there is probably a difference in terms of "sanctification" and we will be rewarded in heaven based upon the extent to which we follow Christ's commandments.
I think the earlier response re: references to the Torah is spot on and I do think there will be differences in God's eyes regarding our sins, as believers, in obtaining our rewards in heaven.
Behold, the days are coming, says the Lord, when I will make a new covenant with the house of Israel and with the house of Judah