It's a frightening thought but there is something in what you say. The BIG difference is that science starts off from a point of belief - to which it applies theories which are then tested to destruction. Religion , on the other hand, starts off from a point of belief - to which it applies dogma which is then preached to the unthinking. Scientists are actively searching for Dark Matter, Higgs Boson etc and, if found, will publish their findings for review by their peers - relgious institutions take exactly the opposite approach and will hide behind foundation-less platitudes rather than open their beliefs to rigorous examination (god, apparently, works in mysterious ways - which explains everything!!). Whilst science welcomes challenges to the established viewpoint, religion used to welcome the opportunity to tie someone to a stake, now it just buries its head in the sand. Many a true word may be spoken in jest - but so is a lot of bo77ock5.
It's true that both will start with conjecture and 'belief' - it's how they handle this that seperates one from the other and, likewise, seperates sense from nonsense.