Sure, but they are mostly seen as superficial differences that people don't much care about in practice. One might not want to go to Mass because they prefer the style of a modern evangelical service, but they couldn't care less if you go to Mass and have no interest in converting you to their style. As an example, Catholics who move to a new area might start attending a Methodist church because of the similarities in services. I'm sure many of the leaders are aware of the deeper differences, but among the people not many care.