Get lost. Its been documented.
More honest investigation reveals differences to be slight in most regards, but admittedly there being a dozen or so significant differences, with those chiefly found among those whom lift themselves up as the only true or entirely correct "church". Sort of like Rome does, just different.
Now---show me 10,000 Christian churches all in [serious or significant] disagreement with one another.
And I could show you thousands of "Catholics in name only", by which I mean there is range of opinion within the RCC which is allowed, but similar when seen in others is pointed at "look, they don't agree. see? we told you".
Perhaps one needs be outside of Romish quarters to better see the double standards of measurement and comparison.
Now that that is out of the way ---define this church which Christ built. Take your time, as long as it takes.