I don't usualy find myself saying good things about RCism, but they traditionally run one of the best private alternatives to public school from kindergardten through high school, to the extent that a number of non-catholic parents send their kids to private catholic schools where they are the best option in their local area. I don't think the same can be said about JW. They run a fair number of very good universities as well. (Though I have no idea and very much wonder what goes on in biotechnology labs in these universites though, like, when it comes to stem cell research and so on. It's probably the case that they just don't "offer" those particular courses of study.)
That said, Catholics generally don't know much about the actual contents of the bible though, unless they are really hardcore like my father, attending mass 7 days per week, eating sleeping and breathing religion. (I cannot get through a phone call with him without anywhere from 30 mins to several hours devoted to a rambling monologue about what he saw on EWTN, or how I should go to church even if I don't want to, or, when confronted by me about the issue, how the catholic church abhors child abuse as evidenced by the measures taken against all the priests and bishops found guilty of the terrible sin (pretty much the same mix of denial and displayed digust the JWs react with). All my years growing up as a catholic the bible was just a curiosity that gave me a headache when I tried to read it. There was never an emphasis on the exact wording in the bible -- not even in religious study. The teachings were always about the meanings behind the words, not the precise words themselves.