The major difference comes down to the authority of the Church. Protestants do not accept it, and therefore anything that relies on that authority or the sacred oral tradition that is preserved by the Church, is rejected by them. I was raised Methodist, and converted to Catholicism 14 years ago. Feel free to email me if you have any specific questions. @Pinx - The Ascension is about Christ, not Mary. If you're going to attack Catholicism, you might want to get the facts straight first. Mary was "assumed" into heaven, which means God took her up, body and soul. Christ ascended into heaven, under his own divine power, because he is God. There is a huge difference and Catholics know that. I didn't even read the rest of your post closely, I could just see it was filled with just as many misconceptions.