It doesn’t make a difference. The point is that if you do not want to be a Catholic and still want to call yourself a Christian there are certainly thousands and thousands of ‘Christian’ churches to choose from. Choose one.
And by the same source that you used, as Alex showed you, there are also thousands of "catholic" churches to choose from.
It isn't up to me to be called a Christian. That is up to the Lord God Jesus Christ. Lots of people can call themselves Christians, but aren't. Millions have done that since His resurrection. I can call myself lots of things. It doesn't mean I am any of those things. :)