Pablo,
Well, it depends on the person. There are
some Catholics who know Scripture better than
some Protestants. However, in general, I know what you mean. Most Protestants who would identify themselves as “born again” or “Bible-believing” put all their emphasis on learning Bible verses. From childhood in Sunday school, they memorise verses.
Catholics tend not to memorise single verses so much but to look at the big picture of salvation history (in my experience). For example, at Mass we don’t usually say the chapter and verse of the Reading, but say the book of the Bible it is from.
One thing you can do is improve you own knowledge of Scripture (and I personally avoid arguments with Protestants and focus on my own spiritual journey).
Here is a very good website:
Scripture Catholic
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ScriptureCatholic.com provides over 2,000 Scripture citations from the Old and New Testament that explain and defend the teachings of the Catholic Church. This site also provides hundreds of excerpts from the writings of the early Church Fathers (1st through 8th centuries). These writings explain the Fathers’ interpretation of Scripture and demonstrate that the early Church was unequivocally Catholic. Through the study of Scripture and the Church Fathers, we see that, not only is the Catholic faith biblical, Catholicism is Bible Christianity par excellence.”**