What is the distinction between the Sacrament of Marriage for the Catholics vs that of the Orthodox?

It was a surprise to me during a recent conversation that a marriage could be performed by someone other than a priest in the Catholic Church. And after reviewing the only similar question on this site, I decided that I would ask it more properly. Here is some of my understanding of the Sacrament of Marriage within the [Eastern] Orthodox Church. However, as I know people might like to read a source, here is the Orthodox Church of America website (The Orthodox Faith, Volume II - Worship / The Sacraments - Marriage ) >Jesus taught the uniqueness of human marriage as the most perfect natural expression of God’s love for men, and of his own love for the Church. > > According to Christ, in order for the love of a man and woman to be that which God has: perfectly created it to be, it must be unique, indestructible, unending and divine. The Lord himself has not only given this teaching, but he also gives the power to fulfill it in the sacrament of Christian marriage in the Church. 1. The Sacrament of Marriage is the oldest sacrament, instituted by God Himself within the Garden of Eden. 2. A Man and Women become one spirit and one flesh, in a way that is not possible for humans alone. (The Holy Spirit is involved here) 13. Marriage is the human expression of the creative and caring love of God, (the perfect Love of the Three Persons of the Holy Trinity) 14. As such a Marriage is a relationship between Man, Woman, and God. 3. Marriage does not "part in death" but is fulfilled and continues. (It is an eternal sacramental reality) 8. Marriage is a mystical participation in the divine relationship with God. (it is a Sacrament) 15. Marriage is a sacrament, it requires a Priest/Bishop. 4. Marriage as Sacrament is closed to the non-Orthodox, without explicit permission from the Bishop. 9. The Sacrament is preceded by the Betrothal rite. (Where rings are exchanged) 5. The Physical Symbol of the Marriage are crowns. (Stefana) 6. There are no Vows or Contractual Language, God unites the couple through the Church's blessing. 10. Marriage involves the Eucharist, the couple receive communion together. 7. The marriage is a combination of Joy and ascetic struggle. 11. Marriage is a path to theosis (union with God) where the couple helps each other grow in holiness. 12. Only 1 marriage can contain the perfect meaning and significance that Christ has given us. (Divorce/remarriage is ... a whole other subject) I'm not sure if that is everything, but that is what came to mind after looking up and remembering the preparation stuff for my own marriage. How is it different for the Catholics?