By the way, what about the description of Catholic belief from the Lutheran Church is wrong?
Since you asked:
Lutherans believe that Scripture alone has authority to determine doctrine; the Roman Catholic Church gives this authority also to the pope, the church, and certain traditions of the church.
Neither the Pope nor the church can "determine doctrine" in the sense that they can make it up out of whole cloth. They can reiterate, explain, or expand upon the Deposit of Faith, but they cannot contradict it at all. Public revelation closed with the death of the last apostle. All we can do is try to understand its implications.
If you want to see a good exposition of the Catholic view of Scripture, read Vatican II's decree Dei Verbum.
Lutherans believe that a person is saved by God's grace alone through faith alone in Christ alone.
Nothing in the NT says anything about being saved by faith alone. In fact, the one place the words "faith alone" are used says you are not saved by faith alone. That's in James chapter 2.
The Roman Catholic Church, while at times using similar language, still officially holds that faith, in order to save, must be accompanied by (or "infused with") some "work" or "love" active within a Christian.
This is a completely muddled and confused description of Catholic doctrine.
What we believe is straight from the NT: "Faith without works is dead ... such a faith has no power to save one" (James 2) and "Neither circumcision nor uncircumcision counts for anything, but only faith working through love" (Galatians 3) and "If I have faith enough to move mountains, but have not love, I am nothing" (1 Corinthians).
The first point says that the for the LCMS the Scripture determines doctrine, but that in the RCC the Pope and tradition have the same authority.
This is simply false.
The RCC position is that Scripture is authoritative. However, Scripture can be correctly or incorrectly interpreted.
Tradition is the handing of correct interpretations of Scripture and the Papacy is an office in the Church to which this interpretative authority is entrusted.
Scripture is the Word of God itself, and apostolical tradition and the Petrine office are the elements of the Church that protect the Scripture from misinterpretation.
tradition is teaching and the Petrine office is a teaching office - the Scripture is the subject they teach.