There’s two points of origin (at least) in comparing churches. From the inside out, and then from the outside in.
The CC says you need the sacrament of reconciliation, confessing through a priest to God. Scripture does say that we should confess our sins one to another. The authority to forgive sins was given by Christ. That’s an inside outward point of view.
From the outside looking in, nearly every Protestant uses Luther’s bible – the books that he himself chose to put into the Bible and to leave out the one’s he didn’t like. That’s a key decision that everybody makes implicitly (usually) or explicitly, like myself. I don’t invest that much authority into Luther. Dietrich Bonhoeffer did exactly that – he said Luther was the greatest man since Christ – read the introduction to The Cost of Discipleship. That throws a lot of early church fathers, popes, and church councils under the wheels of the bus.
Now, read 2 Tim 3:15 to the end of that chapter. “All scripture is inspired by God…” is it? That was written in Greek to Greek speaking Christians and was UNDOUBTEDLY referring to the Greek Septuagint version of the bible (The Greek translation of Hebrew Scriptures completed about a century before Christ.) If “all scripture” does not refer to the Septuagint (which includes the books Luther removed from the canon) then Paul’s statement to Timothy is an unsolvable mystery. IS THIS A MYSTERY TO YOU? It is not to me. The CC actually does not accept all the Septuagint, but largely so.
This is the key interpretation that you need to make – what Bible are you holding in your hands.
Luther changed the Bible, Henry VIII left the church and appointed himself head of the church of England (“pope”, in other words) and he granted himself permission to divorce.
Look at the beliefs or non-beliefs in the Eucharist – the real presence of Christ. The Orthodox accept this teaching, most if not all protestants do not.
These are black and white issues for you to consider and to use to form your conscience. I am Catholic and I only look outward to other systems of belief to see where they have gone astray. I can’t become a Protestant because I can’t overrule St. Paul and throw those books out of the Bible, I can’t take divorce as permissible, and I can’t deny the real presence. So, that’s from the outside looking into the Church, which I consider my earthly spiritual home.
Personally, I do look for other scholarly interpretations of scripture, in various Protestant and Jewish reference sources – and these are helpful when I can’t find the corresponding Catholic source. To respond to this thread, I have to get a little technical. The Pontifical Biblical Commission writes that scripture is a inexhaustible source of inspiration, so I look forward not to a single, final interpretation of scripture. I look at Bible study as a ladder that I am constantly climbing, always waiting for more.